ALESIS M20 PROFESSIONAL 20-BIT DIGITAL RECORDER OWNER’S MANUAL FIRST EDITION VERSION 1.06 APPLIES TO OPERATING SOFTWARE VERSION 1.11 INCLUDES SOFTWARE VERSION 2.
ALESIS M20 REFERENCE MANUAL 1.
TABLE OF CONTENTS Important Safety Instructions and Compliance Notices ......................................vii Safety symbols used in this product ................................................................................................ vii Please follow these precautions when using this product: ............................................................ vii Instructions de Sécurité Importantes .................................................................................................
Table of Contents 3.3 Editing Conventions......................................................................................................................4 Tape Formatting...............................................................................................1 4.1 Sample Rate Selection....................................................................................................................2 4.1a Pull-up and Pull-down Sample Rate Selection ..............................................
Table of Contents 8.8a Setting Auto Record Punch Points................................................................................8 8.8b Enable Auto Record.......................................................................................................9 8.8c Set Auto Punch Points “On the Fly” .............................................................................9 Autolocation .................................................................................................... 1 9.
Table of Contents 13.8 Rewind/Fast Forward TC Output (Page 8)...............................................................................3 13.9 Unthread Timeout (Page 9).........................................................................................................3 13.10 Search Enable (Page 10).............................................................................................................4 13.11 Locate Before Play (Page 11) ..........................................................
Table of Contents 16.3a SMPTE Chase Offset ....................................................................................................5 16.3b Internal Generator ABS Offset .....................................................................................6 16.3c Tape Offset....................................................................................................................6 16.4 SMPTE Time Code Rates and Types.........................................................................
Table of Contents MIDI Thru .............................................................................................................................................6 New Utility page order ........................................................................................................................6 CADI display changes..........................................................................................................................6 Cassette Auto-Inject ...............................
IMPORTANT SAFETY INSTRUCTIONS AND COMPLIANCE NOTICES SAFETY SYMBOLS USED IN THIS PRODUCT This symbol alerts the user that there are important operating and maintenance instructions in the literature accompanying this unit. This symbol warns the user of uninsulated voltage within the unit that can cause dangerous electric shocks. PLEASE FOLLOW THESE PRECAUTIONS WHEN USING THIS PRODUCT: 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5.
Safety Notices 9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. When the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10.
Safety Notices INSTRUCTIONS DE SÉCURITÉ IMPORTANTES SYMBOLES UTILISÉS DANS CE PRODUIT Ce symbole alèrte l’utilisateur qu’il existe des instructions de fonctionnement et de maintenance dans la documentation jointe avec ce produit. Ce symbole avertit l’utilisateur de la prèsence d’une tension non isolèe à l’intèrieur de l’appareil pouvant engendrer des chocs èlectriques. Veuillez suivre ces prècautions lors de l’utilisation de l’appareil: 1. Lisez ces instructions. 2. Gardez ces instructions. 3.
Safety Notices 16. Ce produit, utilisè avec un amplificateur et un casque ou des enceintes, est capable de produite des niveaux sonores pouvant engendrer une perte permanente de l’ouïe. Ne l’utilisez pas pendant longtemps à un niveau sonore èlevè ou à un niveau non confortable. Si vous remarquez une perte de l’ouïe ou un bourdonnement dans les oreilles, consultez un spècialiste. BEIM BENUTZEN DIESES PRODUKTES BEACHTEN SIE BITTE DIE FOLGENDEN SICHERHEITSHINWEISE: 1. Lesen Sie die Hinweise. 2.
Safety Notices INFORMATION TO THE USER FOR CLASS A DIGITAL DEVICE (FCC PART 15, CLASS A) This equipment has been tested and found to comply with the limits for a class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Safety Notices CE DECLARATION OF CONFORMITY Manufacturer’s Name: Alesis Corporation Manufacturer’s Address: 1633 26th Street Santa Monica, CA 90404 USA declares, that the product: Product Name: Product Type: M20 Modular Digital Multitrack Recorder conforms to the following Standards: Application of Council Directive: 89/336/EEC; 73/23/EEC Safety: EN 60 065 (1993) First Edition, Amendment No.
CHAPTER 1 OVERVIEW, SETUP, AND BASICS The Alesis M20 is an 8-track digital tape recorder that records on S-VHS videotape cassettes. It is compatible with the ADAT format used with several other digital recorders (Alesis ADAT, ADAT XT, LX20, and XT20; Studer V-Eight; Fostex RD-8 and CX-8; and Panasonic MDA-1). 1.
Overview, Setup and Basics, Chapter 1 1.2 UNPACKING AND INSPECTION Please retain the M20’s shipping carton, which is designed to protect the unit during shipping, in the unlikely event that you need to return the M20 for servicing. Some carriers have restrictions on shipping electronic equipment without the original packing.
Chapter 1, Overview, Setup and Basics Alesis cannot be responsible for problems caused by using the M20 or any associated equipment with improper AC wiring. 1.4 LINE CONDITIONERS AND PROTECTORS Although the M20 tolerates typical voltage variations, the AC line voltage may contain spikes or transients that can possibly stress your gear and, over time, cause a failure. There are three main ways to protect against this, listed in ascending order of cost and complexity: • Line spike/surge protectors.
Overview, Setup and Basics, Chapter 1 1.6 BASIC AUDIO HOOKUP When connecting audio cables and/or turning power on and off, turn off all devices in your system and turn down your monitor system’s volume controls. The M20 provides 10 pairs of XLR connectors (8 pairs for audio in/out, 1 pair for the auxiliary analog channel, and 1 pair above for SMPTE time code). The nine sets of audio XLRs connect to your mixer’s tape or line inputs and outputs.
Chapter 1, Overview, Setup and Basics 1.11 OPERATING ENVIRONMENT Mount the M20 in an equipment rack (requires 4 rack spaces) or place it on a table or shelf. Alesis advises against tilting the recorder; keep it horizontal. Also remember that heat shortens the life of electronic equipment. Please observe the following: • The M20 is designed to perform properly over a range of ambient temperatures from 10° C to +40° C (50° F to 104° F), in up to 80% non-condensing humidity.
Overview, Setup and Basics, Chapter 1 Figure 1 (M20 Front Panel) 1-6 ALESIS M20 REFERENCE MANUAL 1.
CHAPTER 2 CONTROL AND CONNECTOR BASICS 2.1 ABOUT THE FRONT PANEL Referring to Fig. 1, the front panel includes: • S-VHS cassette door and Eject button • Main vacuum fluorescent display (toward the center) with two sets of 10-character 7segment readouts. The left readout shows the current tape location. The right readout shows information such as incoming SMPTE time, locate address, current offset, etc.
Control and Connector Basics, Chapter 2 Figure 2 (M20 Rear Panel with optional EC-1 AES/EBU Card) 2-2 ALESIS M20 REFERENCE MANUAL 1.
Chapter 2, Control and Connector Basics 2.2 ABOUT THE REAR PANEL Referring to Fig. 2, the rear panel includes: 2.2A PUNCH FOOTSWITCH This allows foot-controlled punch in and out. Use a momentary footswitch, either normallyopen or normally-closed (the M20 senses the type on power-up and calibrates itself). 2.2B LOCATE/PLAY OR LRC REMOTE CONTROL JACK This 1/4” jack accepts a momentary footswitch (normally closed or open) to allow footcontrolled location functions.
Control and Connector Basics, Chapter 2 2.2G VIDEO IN AND THRU The BNC connector video input (with 75 ohm termination switch) accepts composite video as well as black burst video inputs. 2.2H ADAT SYNC IN AND OUT These 9-pin D connectors synchronize multiple ADATs together to single-sample accuracy. Computer interface cards with ADAT sync, such as the Alesis ADAT-PCR, allow transferring ADAT data to and from a computer for editing with single-sample accuracy.
CHAPTER 3 EDITING M20 OPERATING PARAMETERS 3.1 THE KEYPAD The keypad block contains switches for editing the various parameters that control the M20’s features. 3.1A 0 THROUGH 9 BUTTONS Use the 10 numeric keys to enter number parameter values and letters for names. When editing a parameter value, pressing a key enters its associated number. When editing a name, pressing a key cycles through the letters indicated on the keycap (e.g., pressing 7 repeatedly cycles through 7, s, t, u, v, 7, s, t…etc.). 3.
Editing M20 Parameters, Chapter 3 3.1F ENTER/NAME This key has two main uses: • Speed up numeric entry by eliminating the need for “leading zeroes.” For example, the varispeed setting is a 3-digit value. Instead of having to key in something like 0 - 0 - 9, you can simply key in 9, then press Enter. • Edit location point names. When the locate time is the currently selected field, pressing the Enter/Name button positions the cursor at the first character of the name.
Chapter 3, Editing M20 Parameters 3.1G SELECTING PAGES Most buttons have at least one associated display page, which contains one or more parameters. If there are multiple pages, the main display’s left side shows the current page number; repeatedly pressing the associated button cycles through the pages. Shortcut: To access a particular page directly, hold the associated button and use the keypad to enter the desired single-digit page number. Functions with double-digit page numbers (e.g.
Editing M20 Parameters, Chapter 3 3.2 THE EDIT BUTTON The Edit button toggles the M20 in and out of Edit Mode. Enabling Edit mode (button lit) allows editing parameter values for the functions grouped with the Edit button: Track Delay, Tape Offset, SMPTE Chase, Internal Gen, Format, Pre-Roll, Post-Roll, Auto Return, and Auto Record. While Edit is On, only the currently selected function’s switch will light.
CHAPTER 4 TAPE FORMATTING Formatting is essential to the ADAT system. It creates a sample-accurate time reference (i.e., it’s accurate to 1/48,000th of a second when recording at 48 kHz) on each tape, in addition to block ID codes, linear control track, and other essential markers. This provides tight synchronization ó far better than SMPTE sync ó between ADAT-compatible devices, as well as precision tape counter readings and intelligent autolocation functions.
Formatting Tape, Chapter 4 4.1 SAMPLE RATE SELECTION Choose between 44.1 kHz (CD/consumer standard) or 48 kHz (DAT/professional standard). Here are some general hints: • If mixing the tape through a digital mixer for a CD master, use 44.1 kHz to avoid sample rate conversion. • If mixing the tape through an analog mixer, use 48 kHz for slightly better high frequency response.
Chapter 4, Formatting Tape 4.1A PULL-UP AND PULL-DOWN SAMPLE RATE SELECTION The Sample Rate button is also used to select the respective 0.1% pull-up and pull-down rates. A pull-up is available with a 30 fps SMPTE rate only. A pull-down is available with a 29.97 fps SMPTE rate only. Use pull-up or pull-down after a standard tape format: It is not necessary to pre-select a pull-up or pull-down prior to formatting since the “pull” status is not recalled when tapes are subsequently reinserted.
Formatting Tape, Chapter 4 4.3 FORMAT A NEW TAPE Use only S-VHS blank tapes formulated specifically for Super VHS video or digital audio applications. Never use standard VHS tapes. “Exercise” the tape: Before formatting, fast forward the tape to the end and rewind it to even out the tape pack and sweep any contaminants off the tape. Operation Insert blank tape Enable formatting Initiate formatting You press… Tape into tape chamber.
Chapter 4, Formatting Tape 4.5 EXTEND A PARTIALLY-FORMATTED TAPE • The procedure is similar to standard formatting, except: • Make sure the tape is located at least 20 seconds before the end of a previously-formatted section before attempting to extend the format. • Regardless of the current sample rate and word length, these will change automatically to match the original format. • After pressing the Format button, press and hold Play then press Record.
Formatting Tape, Chapter 4 4.9 LOCK OUT FORMATTING (SAFE MODE) You may lock out the format option to prevent accidental formatting. This remains in effect, even if you insert different tapes, until the setting is changed.
CHAPTER 5 TRACK RECORD ENABLING AND MONITORING 5.1 TRACK BASICS The M20 can record a total of 10 tracks: • 8 digital audio tracks. These record standard audio signals, either from the analog inputs, optional AES/EBU card, or ADAT Optical Interface. • 1 analog Aux track. This track records audio information from the Aux input, along with any of the eight audio tracks routed to the Aux track.
Track Record Enabling and Monitoring, Chapter 5 5.2 TRACK INPUT ENABLES An input-enabled track monitors the associated input signal. There is one Input Enable button (with associated indicator light) for each track (10 total). The Input Enable button toggles between monitoring the input signal or monitoring the tape.
Chapter 5, Track Record Enabling and Monitoring 5.5 SAFETY MODE (ALL SAFE) To prevent any accidental recording, pressing All Safe places all tracks (channels 1-8 plus Aux and TC) into a safe (non-record ready) mode. This is particularly useful when mixing.
Track Record Enabling and Monitoring, Chapter 5 5-4 ALESIS M20 REFERENCE MANUAL 1.
CHAPTER 6 DIGITAL/ANALOG INPUT SELECTION AND ROUTING 6.1 DIGITAL SOURCE When using digital inputs, this function selects one of two or three digital input options. The I/O card option will appear in the display only if an I/O card (such as the Alesis AES/EBU card) is installed in the machine. Settings are retained in memory.
Input Selection and Routing, Chapter 6 If no digital signal input is detected, the D indicators for the channel(s) without a digital signal source will flash until signal is detected. 6.3 TRACK OUTPUT SELECTION It is not necessary to select an output destination. Audio data always appears simultaneously at the analog, ADAT optical, and optional AES/EBU outputs. Audio always appears at the same-numbered output it was recorded on. 6.
Chapter 6, Input Selection and Routing 6.4A ANALOG INPUT ROUTING The three analog routing modes accommodate 2, 4, or 8 bus mixing consoles. With two buses, connect them to inputs 1 and 2. With four buses, connect them to inputs 1 through 4. With 8 buses, direct outs or a patch bay, run each bus out to its like-numbered M20 input. The analog routing choices are: • Odd/Even: Press either the Track 1 or 2 button. Input 1 feeds channels 1, 3, 5, 7, and Input 2 feeds channels 2, 4, 6, 8.
Input Selection and Routing, Chapter 6 6.4B DIGITAL INPUT ROUTING The Digital Source setting (section 6.1) influences the digital input routing process. This feature makes it possible to record incoming digital data on any track desired, without manually repatching. If digital source = ADAT Optical: Any of the 8 incoming optical channels may be individually selected or de-selected with the Track Input buttons while in Digital Routing mode.
Chapter 6, Input Selection and Routing 6.4C RECORD-ENABLING THE DESTINATION TRACKS In Digital Routing mode, inputs need not be routed only to same-numbered tracks. Any selected digital source inputs can be re-routed to any record-enabled destination tape tracks, in ascending order.
Input Selection and Routing, Chapter 6 6.5 AUX ROUTING (INPUT AND OUTPUT) The analog Aux track of the M20 is a unique feature that has special application in Search mode, because it allows you to hear audio at extremely slow speeds for cueing. The Aux Routing feature allows you to automatically mix other tracks for recording onto this track. The back panel Aux Input is permanently routed to the Aux track. The Aux Routing button selects whether additional inputs will also feed the Aux track (e.g.
CHAPTER 7 METERING With digital recording, it is very important not to exceed the available headroom (and with 20 bits to play with, you have so much dynamic range that there’s no need to push it). The M20 provides three different metering modes to make it easier to avoid overloads. 7.1 METER MODE SELECTION The Peak Mode button cycles through three different meter modes: • No Peak Hold. Meter levels reflect the current input signal levels. • Momentary Peak Hold (default).
Metering, Chapter 7 7.2 METER SETUP The VU meter scaling, headroom, decay time, and peak hold time are all adjustable using the Display menus. The Display button is in the lower left group of buttons beneath the meter display. Scaling determines whether the meter range is -72 dB to 0 (Normal; this is the default) or -2.0 to +2.0 (Fine). Headroom sets the headroom amount for the Fine VU meter mode (it does not affect the normal mode) by letting you specify what value the 0 dB marking represents.
CHAPTER 8 TRANSPORT CONTROLS AND BASIC RECORDING The transport buttons include Rewind, Fast Forward, Stop, Play, Record, and Eject. The transport movement may also be controlled by the jog/shuttle wheel, or various built-in automatic features. 8.1 ABOUT THE TAPE COUNTER The tape counter, located on the right side of the right display, shows the current tape location. The Tape Counter button selects the counter mode (the 10-digit location counter is above the Tape Counter switch).
Transport Controls and Basic Recording, Chapter 8 8.3 PLAY How Play affects tape motion depends on the tape’s status.
Chapter 8, Transport Controls and Basic Recording 8.4B SHUTTLE MODE Shuttle advances or rewinds the tape at a rate proportional to the degree of wheel rotation. The greater the degree of rotation from the center detent, the faster the rate.
Transport Controls and Basic Recording, Chapter 8 8.4D SEARCH MASTER This function (available only in the ID 1 master M20 in a system) accommodates situations where you want to use jog on a machine that is not the master (e.g., to find a particular point on the tape of a slave ADAT only).
Chapter 8, Transport Controls and Basic Recording 8.
Transport Controls and Basic Recording, Chapter 8 8.6 RECORD This button’s operation depends on whether One-Button Record (section 13.4) is enabled or disabled. You press… Record, and while holding, press Play Record If tape is stopped Recording begins If tape is moving You see… Recording begins Record button lights Recording begins No change in existing status If recording, record button lights If the Format light is lit, entering Record mode will format the tape (see Chapter 4 on formatting).
Chapter 8, Transport Controls and Basic Recording 8.6C RECORD WRITE-PROTECTION S-VHS cassettes have a write-protect tab on the side of the tape opposite the “door” that, when removed to create a small “window,” prevents recording. The M20 senses the writeprotect tab status. If the tape is write-protected, the M20 will not allow recording or formatting to take place. Attempting to record causes the display to show “ERROR - Write Protected,” and the transport will enter or remain in play.
Transport Controls and Basic Recording, Chapter 8 8.8 AUTO RECORD In Auto Record mode, you can program punch in and out points. Pressing Play and Record prior to the punch-in point causes the M20 to automatically punch in and out at the programmed points. You first must set auto-punch points, then enable the function. The auto-punch in and out points default to autolocation points 98 and 99 respectively.
Chapter 8, Transport Controls and Basic Recording 8.8B ENABLE AUTO RECORD To enable and disable Auto Punch, make sure the machine is not in Edit mode (if necessary, press the Edit button so that it turns off).
Transport Controls and Basic Recording, Chapter 8 8-10 ALESIS M20 REFERENCE MANUAL 1.
CHAPTER 9 AUTOLOCATION The M20 can autolocate to specific points on the tape. Its built-in memory contains 100 different location points, complete with 8-character names. Locate points are used not only for convenience, but in several other functions of the M20 such as Auto Record and Tape Offset. These points are saved in the memory of the M20 even when power is turned off, and may even be saved to the data header of each tape or to a MIDI file via a sysex dump.
Autolocation, Chapter 9 To select and edit location points: Operation Copy Tape Location to memory You press… Copy Tape Location button Store Locate Point Set Locate button Select Locate Point Locate Select button, then Up/Down Arrows or number keys to select the desired location point Edit Locate Point Locate Select button, then press Cursor Left/Right to select the field to be edited (it will flash).
Chapter 9, Autolocation 9.2 DEFERRED PLAY AND RECORD To automatically enter Play mode after locating, press Play before a locate completes. To cancel while tape is moving, press Stop, Rewind, FF, or Search. To automatically enter Record mode after locating, press Play and Record before a locate completes. To cancel while tape is moving, press Play, Stop, Rewind, FF, or Search. 9.3 PLAY-AFTER-LOCATE (AUTO PLAY) To always enter Play mode after completing a locate, press Auto Play (its button lights).
Autolocation, Chapter 9 9.4A SETTING LOOP START AND END POINTS To edit the start and end locate points, follow the steps below.
Chapter 9, Autolocation 9.6 SET POST-ROLL For rehearsal or recording in Auto Record mode, setting a post-roll time causes the tape to go beyond the punch-out point by the specified post-roll time prior to stopping (0 to 25 seconds; default is 5 seconds). Setting post-roll = 0 causes the tape to locate to the cue point (same as disabling post-roll).
Autolocation, Chapter 9 9.7 FOOTSWITCH-CONTROLLED LOCATION If the transport is playing, pressing the Locate/Play footswitch locates the transport to the Auto Return locate point, then stop or enter play, depending on the setting of the Auto Play switch (section 9.3). Pressing the Locate/Play footswitch while the tape is locating initiates stop. Note: If the transport is stopped, pressing the Locate/Play footswitch initiates play. 9-6 ALESIS M20 REFERENCE MANUAL 1.
CHAPTER 10 VARISPEED Varispeed changes the sampling rate to change the audio’s pitch. This feature only applies when the Clock Source is set to INT (Internal). Pitch mode is automatically set to Fixed whenever the M20 is being controlled by an external unit (for example, when SMPTE Chase is on). The varispeed range is -300 through +100 cents (-15.91% to +5.95%) at a base 48 kHz sample rate and -200 through +200 cents (-10.91% to +12.25%) at a base 44.1 kHz sample rate.
Varispeed, Chapter 10 10-2 ALESIS M20 REFERENCE MANUAL 1.
CHAPTER 11 SMPTE, SYNC, AND OFFSET FUNCTIONS The buttons described in sections 11.1 through 11.5 are located under the main (right) display. The buttons described in sections 11.6 through 11.9 are part of the Edit button group toward the M20’s lower left under the meter display and track arming buttons. 11.1 CLOCK SOURCE This switch cycles through up to seven different clock selections.
SMPTE, Sync, and Offset, Chapter 11 11.2 SMPTE RATE SMPTE Rate cycles through six different SMPTE frame rates and types; this affects both SMPTE time code input and M20 SMPTE time code output. It is not possible to receive and transmit different frame rates simultaneously. • • • • • • 24 25 29.97 29.
Chapter 11, SMPTE, Sync and Offset For example, Int Gen always generates time code when the Internal Generator TC Start Ref parameter is set to User Set, Free Run, and the TC Input button is lit. Setting this parameter to ABS Time generates time code only if there is a valid, ADAT-formatted tape in the transport. Setting this parameter to TC Track generates time code only if there is valid time code recorded on the TC track of the tape.
SMPTE, Sync, and Offset, Chapter 11 11.5 REFERENCE COUNTER This button cycles through the reference counter display options (this display is above the Reference Counter button). The selected display option (just below the display digits) shows one of the following times: • SMPTE In Incoming time code • Locate Pt 2-digit locate address shown in the Locate Pt block • Tape TC TC track time code • Int Generator Internal generator time code • Offset Tape or chase offset 11.
Chapter 11, SMPTE, Sync and Offset 11.6B SET SMPTE CHASE MODE (PAGE 2) There are two chase modes: Frame-Lock (default) and Lock/Release (i.e., Lock and Release to clock). Chase must be enabled. The Down Arrow button or keypad button 0 selects Frame-Lock. With Frame-Lock mode, the M20 will relocate to incoming time code if it does not match the current tape location. The Up Arrow button or any keypad button greater than 0 selects Lock/Release.
SMPTE, Sync, and Offset, Chapter 11 11.7 INTERNAL GENERATOR This button turns the internal time code generator on and off (Time Code Source must be set to Internal; see section 11.3). Setting the Time Code Source to External automatically turns off the Internal Gen function. If you press Int Gen when TC Source is External, the display will read “TC Source not internal”. If the TC Source is Internal, then the generator may be turned on or off.
Chapter 11, SMPTE, Sync and Offset 11.7B TIME CODE START REFERENCE (PAGE 2) This page sets the internal generator’s starting reference. Use the Up/Down buttons to select one of three options, or use the keypad numbers given below. • With ABS Time (keypad 0), the internal generator’s start address is the current ABS address plus any ABS offset (set on Page 3). The generator outputs time code based on the M20’s absolute time track.
SMPTE, Sync, and Offset, Chapter 11 11.7D USER BITS (PAGE 4, OR PAGE 3 IF THE PAGE 2 VALUE IS TC TRACK) This page allows entering 8 hex characters (0 - F) into the user bits of the SMPTE time code. These bits are used to identify reels, projects etc. and may be displayed by an appropriate SMPTE time code reader.
Chapter 11, SMPTE, Sync and Offset Operation Select Time Code field to edit Change sign (+ to add offset, - to subtract) Change numeric field value Exit Tape Offset setup You press… Left/Right Arrow buttons to scroll to desired field Up/Down buttons Enter two-digit number from keypad (leading zeroes must be entered) or use Up/Down buttons Edit button or any other Edit Group button You see… Selected field flashes Flashing sign changes from (+) to (-) Field to be edited flashes, then is replaced by your e
SMPTE, Sync, and Offset, Chapter 11 11.9 TRACK DELAY Track Delay allows offsetting individual tracks in time. Example: Delaying a snare part slightly compared to other drums can give a more “laid back” feel. Maximum delay time is 170.0 ms at 48 kHz and 185.0 ms at 44.1 kHz, adjustable in 0.1 ms steps (0 through 8160 samples). The delay time displayed is accurate only while playing at normal pitch (48 kHz or 44.1 kHz), and will not compensate for pitch changes or external clock variations.
Chapter 11, SMPTE, Sync and Offset To change delay for several tracks at once: Operation Select tracks to edit Select Delay Time display (ms or samples) Change Delay Time display (ms or samples) Select Delay time for editing Change delay time Exit Track Delay setup ALESIS M20 REFERENCE MANUAL 1.06 You press… Press track Input Enable button for one track to be delayed and while holding it, press Input Enable buttons for other tracks to be delayed. The All Input button selects all tracks.
SMPTE, Sync, and Offset, Chapter 11 11-12 ALESIS M20 REFERENCE MANUAL 1.
CHAPTER 12 MIDI FUNCTIONS There are seven pages of MIDI functions. Pressing the MIDI button cycles through the pages in order. 12.1 MIDI DEVICE (PAGE 1) Selects the M20’s device ID (1—127 or All) so that MIDI Machine Control systems with multiple M20s can address them separately. Selecting All means that M20s respond to all incoming MIDI messages. Default ID = 000. Use the Up/Down buttons or number keys to enter the desired ID. To enter All, scroll past 127, or enter any number greater than 127. 12.
MIDI Functions, Chapter 12 12.5 RECEIVE SYSEX DUMP? (PAGE 5) Receives setup information (as MIDI system exclusive data) via the MIDI In port. This could come from another M20 or a data storage device. Action to perform… With Page 5 selected, press Yes Initiate dump from the transmitting device Wait for dump to end Display shows… Rdy to Recv Sysex Dump Receiving Sysex Dump Sysex Receive Complete briefly when dump is complete Note: The current setup does not update unless a complete dump is received.
Chapter 12, MIDI Functions Before loading new software into your M20, always save a “backup” of the existing software in the M20 to your computer sequencer or data storage device. This will safeguard against any mishaps that could occur during the software loading process (i.e. corrupted MIDI file, equipment failure, etc.). WARNING: If the M20 loads an incomplete update or incorrect data, the main display will show an error message.
MIDI Functions, Chapter 12 12-4 ALESIS M20 REFERENCE MANUAL 1.
CHAPTER 13 UTILITY MENU There are 22 pages of Utility functions. Pressing the Utility button cycles through the pages in order. Shortcut: To jump directly to a particular page, hold Utility down and enter the page number form the keypad, using leading zeroes to access pages 01-09. 13.1 DIGITAL OUT (PAGE 1) Selects the digital output format and resolution for tapes formatted in 20-bit mode (there is no choice of digital output with 16-bit tapes).
Utility Menu, Chapter 13 When enabled (Online = LED lit), the machine responds to commands from the selected Online Source. Local control may be allowed or ignored, as set on Utility Page 3 (section 13.3). When disabled (Offline = LED off), the machine ignores commands from the selected Online Source. Note: Certain user parameters are not editable when a machine is online, and only some parameters may be edited regardless of online status. The relevant parameters are duplicated and stored in 2 groups.
Chapter 13, Utility Menu 13.6 CROSSFADE TIME (PAGE 6) Sets the crossfade time when the M20 transitions from Play to Record, or Record to Play. With a 48 kHz sample rate, the crossfade values range from 5.4 ms - 1.365 seconds. At 44.1 kHz, the crossfade values range from 5.8 ms - 1.486 seconds. Default is 10 ms. Procedure: Use the Up/Down buttons to cycle through the 32 crossfade times. When punching into the middle of a low-frequency tone, a crossfade time that is too short may cause a click. 13.
Utility Menu, Chapter 13 13.10 SEARCH ENABLE (PAGE 10) Determines how to enable Search mode, where the Jog/Shuttle wheel is active. Procedure: Use the Up/Down buttons to choose between the following: Normal (default). Moving the Jog/Shuttle wheel or pressing the Search button (it lights solid) automatically enables Search mode. Button. You must press the Search button to enable the Jog/Shuttle wheel. 13.
Chapter 13, Utility Menu 13.16 LOAD DATA FROM TAPE? (PAGE 16) Loads the Table of Contents data from tape into the M20. Procedure: Press Yes to load data (the No key has no effect). The tape rewinds immediately to the lead and data sections while the display shows Preparing to Load. The display then shows Loading Tape Data. After loading, the screen reverts to Load Data from Tape. 13.
Utility Menu, Chapter 13 13.20 ERROR RATE (PAGE 20) During playback or record, this screen shows the number of sync block errors per 14 drum revolutions (280 ms), from 0000 to 6720 (maximum number of errors possible). In any mode other than Play or Record, the display reads ----. Sync block errors are normally 100% corrected by the ADAT’s error correction circuitry, but this display acts as a kind of early warning system. Errors of a properly functioning M20 and tape typically fall in the 00000008 range.
CHAPTER 14 THE LRC REMOTE CONTROL The M20 hand-held LRC remote provides the following functions: • Transport functions: Rewind, Fast Forward, Stop, Play and Record. • Autolocation functions: Locate 1, Locate 2, Locate 3, Locate 4, Set Locate and Auto Loop • Track functions: Auto Record and Rehearse. These functions are the same as can be accessed from the front panel controls.
LRC Remote Control, Chapter 14 14-2 ALESIS M20 REFERENCE MANUAL 1.
CHAPTER 15 TUTORIALS AND APPLICATIONS This chapter gives guidance for entire procedures, assuming a basic familiarity with how the controls and menus work from previous chapters. TUTORIAL 1: MULTIPLE M20 OPERATION OVERVIEW Because the M20 is ADAT-compatible, it can work together with up to 16 other ADATfamily machines to provide a total of 128 tracks. ADAT machines have a sync bus that provides timing information and commands for all ADATs in a system.
Tutorials and Applications, Chapter 15 active, so machine 2 decides it’s the master (ID 1) and machine 3 the only slave (ID 2). If you then turn on machine 1, the machines will renumber themselves so that machine 1 becomes the master (ID 1), and machines 2 and 3 become the slaves (ID 2 and 3, respectively). Sync signals cannot pass through a machine that is turned off.
Chapter 15, Tutorials and Applications FORMATTING MULTIPLE TAPES Formatting works similarly to formatting on a single ADAT, however there are some considerations unique to formatting multiple tapes. For more information on formatting, see Chapter 4.
Tutorials and Applications, Chapter 15 MASTER FORMAT DISABLED If the master’s Format indicator is off, you initiate record anywhere in the tape, and the slave’s Format indicator is off: • If the slave tape is unformatted, the slave plays, but the Time counter reads “noFo” (no format) while flashing the Format indicator. • If the slave tape is formatted, the slave autolocates to the same time as the master and plays or records in sync.
Chapter 15, Tutorials and Applications TUTORIAL 2: MAKING DIGITAL BACKUPS You can create safety copies of M20 tapes by copying all eight tracks to another M20 (or ADAT-compatible machine) via the digital bus. Alesis recommends creating a backup whenever you have irreplaceable material on tape. Synchronizing two machines together via the 9-pin sync bus allows for making sampleaccurate copies, referred to the internal time code. This is preferred.
Tutorials and Applications, Chapter 15 DEALING WITH DAMAGED TAPE If a tape is in very bad condition, it may be difficult to copy it from the master to a slave. If there are so many errors that the M20 momentarily loses sync during playback, all slaves will be taken out of record automatically. In this case, put the new tape into the master, the damaged tape in the slave, and copy from the slave to the master.
Chapter 15, Tutorials and Applications TUTORIAL 3: RECORDING DIGITAL AUDIO FROM OTHER SOURCES Recording digital audio onto the M20 from a source other than an ADAT-compatible device requires a digital audio interface, like the Otari UFC-24 or Kurzweil DMTi, or inserting an Alesis EC-1 AES/EBU interface into the M20’s Expansion Card slot. These convert other digital audio formats to the Alesis Optical format.
Tutorials and Applications, Chapter 15 TUTORIAL 4: COMBINING M20S AND ADATS M20 TRANSPORT SPEED The M20’s transport speed is much faster in engaged mode than the original ADAT. Because of this and other unique features, make the M20 the master (ID 1) and any ADAT(s) should be the slave(s). When locating, the M20 will locate to a specific tape position, stop, and wait for the ADAT(s) to catch up.
Chapter 15, Tutorials and Applications POLARITY DIFFERENCES The original ADAT inverted the polarity of the signal being recorded on tape, then flipped polarity again before going to the output jacks. As a result, the output was the same polarity as the input, so no phase problems were possible when using a single ADAT or a multiple ADAT system. However, neither the digital input nor the digital output was inverted.
Tutorials and Applications, Chapter 15 TUTORIAL 5: SETTING UP INPUTS The M20 offers unparalleled flexibility in terms of setting up inputs for recording: signals can come from analog sources, digital sources (ADAT optical or from optional AES/EBU cards), or a combination of the two. As a result, it is important to understand the proper procedure for selecting the right sources for the right inputs. The following gives an overview of the process; for more details, see Chapter 6.
Chapter 15, Tutorials and Applications TUTORIAL 6: UPDATING M20 SOFTWARE The M20 accepts software updates via MIDI. This allows Alesis to offer improvements and changes to the operating system without requiring the unit to be professionally serviced. The fastest way to update the software is to go to the Alesis web site (http://www.alesis.com). Go to the “Software” section, and locate the area containing M20 software updates. Files are in Standard MIDI File format, and can be downloaded as .
Tutorials and Applications, Chapter 15 TUTORIAL 7: USING THE M20 INPUTS AND OUTPUTS WITH UNBALANCED It is possible to use unbalanced signals with the M20, however you will need adapters like the following: Note that it is probable that unbalanced lines will not have enough level to drive the M20 to full scale, and will require preamplification, or the input trimmers of your M20 must be reset to accommodate lower levels. The standard factory setting is +19 dBu = 0 dBFS (just before clipping).
CHAPTER 16 M20 SMPTE SYNCHRONIZATION OVERVIEW This chapter is an overview of the M20’s SMPTE time code features, in addition to the basics covered in Chapter 11. Before you design a synchronization system, and particularly if you have not used time code before, please read this chapter carefully.
SMPTE Synchronization Overview, Chapter 16 The CD player’s digital clock is uncontrolled. The M20 normally would automatically synchronize to an incoming digital signal, but in this case it’s following the video which is traveling at its own speed. Since a slave can’t follow two masters, the slight timing discontinuities appear as clicks and pops as samples are lost.
Chapter 16, SMPTE Synchronization Overview 16.3 REFERENCE COUNTERS VS. CLOCK SOURCES A wristwatch indicates the passage of time in two ways. One is the face of the watch, which gives the information of hours, minutes, and seconds. The other is the “ticking” of the watch several times per second. Conceivably, you could always know what the time is by looking at the face of the watch one time, then counting how many ticks had elapsed.
SMPTE Synchronization Overview, Chapter 16 Another illustration of the need for reference clock comes from the video world. In order to make clean edits between several video recorders, all video sources must display their pictures at the same rate with the frame edges occurring at exactly the same time.
Chapter 16, SMPTE Synchronization Overview 16.3 OFFSETS IN THE M20 An offset is an intentional difference in location between decks. In the simplest situations, offsets are not required: when it’s 2 o’clock on the master, it’s 2 o’clock on all the slaves. But more often, tapes were recorded at different times, in a different order, and now must be edited together at a particular sync point.
SMPTE Synchronization Overview, Chapter 16 16.3B INTERNAL GENERATOR ABS OFFSET This is set in INT GEN EDIT mode, pages 2 and 3 (see section 11.7c). This is used when you want to issue time code from the M20 based on the ABS time plus an offset, usually to record on the TC track of the M20 and/or an external recorder. This is most often used when pre-striping tapes, or when the M20 is a master in a system.
Chapter 16, SMPTE Synchronization Overview 16.4 SMPTE TIME CODE RATES AND TYPES SMPTE time code is the universal standard for transmitting location reference in audio and video systems. SMPTE is primarily a location reference, though it may also be used as a reference clock if necessary, because its signal is sent on a pulse-width modulated audio tone. It transmits time as hours, minutes, seconds, and frames; by looking at the tone it may be divided into subframes.
SMPTE Synchronization Overview, Chapter 16 But since the speed difference between 29.97 and 30 fps is small (only .1%), the M20 cannot detect that fine difference in frequency and will default to the last selected non-drop fps rate (which may not correlate to the incoming time code). If your project is supposed to run at 29.97 fps, make sure the SMPTE rate is set properly. If necessary, change the SMPTE rate using the SMPTE Rate button.
CHAPTER 17 TIME CODE TUTORIAL 17.1 GENERATING TIME CODE ONTO A VCR The first step in time code operations is to record time code onto a master and make sure the slaves can read it. If you’re starting from scratch (i.e., no one is providing you with a video tape already striped with time code), and you simply want to use the M20 as a time code generator without simultaneously having it chase video, follow this procedure: 1 Press EDIT, then INT GEN. The display may read “1 GEN MODE:...”.
Time Code Tutorial, Chapter 17 9 Press INT GEN or TC INPUT to stop the time code generator. The variations of INT GEN should be easy to explore from this point on. Using different options in steps 2, 3, and 4 above, you could generate time code that’s in lock-step with the ABS time of the M20, that starts from the TC track reference, or only generates time code when the M20 itself has a tape in it and is running. 17.
Chapter 17, Time Code Tutorial 17.3 RECORDING A TIME CODE TRACK The most stable and trouble-free method of synchronization for any SMPTE time code system is to pre-stripe all tapes with generator-locked time code first, then perform any transfers, recordings, and edits. If all time codes equal the same number, with no offsets, and are the same SMPTE rate and type (drop or non-drop), and tapes are striped completely from head to tail, this is the easiest and most foolproof system.
Time Code Tutorial, Chapter 17 6 Set the SMPTE Rate and type (24, 25, 29.97, or 30 fps, drop or non-drop). 7 Press the REFERENCE COUNTER button until TAPE TC is shown in the right numeric display. This isn’t a required step, but it’s good practice. 8 Press PLAY and RECORD. At this point, the M20 is recording time code of the specified type and number onto the TC track, at the specified sample rate and speed. Time code cannot be recorded on the LEAD and DATA sections of the tape.
Chapter 18, Maintenance and Troubleshooting CHAPTER 18 MAINTENANCE AND TROUBLESHOOTING Under no circumstances should you remove the top or bottom cover of the M20 unless you are a qualified and careful technician. It is possible to damage your heads and other sensitive parts of your ADAT whenever the cover is open. Do not open up your ADAT to clean the heads unless you are experienced in MDM or VCR maintenance, have the approved tools and materials, and follow all safety procedures. 18.
Maintenance and Troubleshooting, Chapter 18 18.1A HEAD CLEANING CASSETTES (OPTIONAL) For preventative maintenance, you may use a DRY VHS head cleaning cassette if you wish, but Alesis does not see these as a substitute for thorough manual cleaning. Dry cleaning tapes are simply VHS video tapes purposely made with a slightly coarse surface.
Chapter 18, Maintenance and Troubleshooting We do not recommend cleaning the heads with cotton or foam swabs, or chamois. The safest and most effective cleaning is performed using a hydroentangled polyester wipe (Techclean® Wiper #2350, available from Tech Spray) soaked in pure 99% anhydrous (water free) isopropyl alcohol. This particular wipe is lint and particle-free, designed for use in laboratory clean rooms.
Maintenance and Troubleshooting, Chapter 18 18.3 TAPE MAINTENANCE: SAFE TAPE 18.3A TAPE WEAR Head maintenance of the ADAT should be based on the ERROR Indicator (or Error Count Display) or if the unit begins to behave erratically. However, these same symptoms may appear in an M20 with clean heads if the tape being used is worn out or defective.
Chapter 18, Maintenance and Troubleshooting Practice “safe tape” at all times because you can never retrieve lost data. If you are archiving your tapes, make sure they are stored in environmentally stable conditions, i.e. a cool dry place. If you do archive your tapes, you need to check them once a year. Run each tape through your ADAT from end to end. This will prevent buildup that can occur when a tape is left simply “sitting”.
Maintenance and Troubleshooting, Chapter 18 18.4D OBTAINING REPAIR SERVICE Before contacting Alesis, check over all your connections, and make sure you’ve read the manual. Customers in the USA: If the problem persists, call Alesis USA at 1-800-5ALESIS and request the Product Support department. Please have your serial number (located on the back of the machine and starting with a “3D”) when you call.
APPENDIX 1 M20 HIDDEN FUNCTIONS POWER-ON BUTTON COMBINATIONS Holding the following button combinations when the M20 is powered-on will allow access to the following special functions: • Play and Record Performs a user reset which initializes all parameters to their default values. The display will show “Initializing …” MISCELLANEOUS BUTTON COMBINATIONS Accessing hidden functions involves holding the Peak Clear button in combination with the following buttons: • Stop Displays drum head hours.
Appendix 1, M20 Hidden Functions A1-2 ALESIS M20 REFERENCE MANUAL 1.
M20 Software Version 2.00 ADVANCED FUNCTIONS Although not technically hidden functions, the following are additional advanced features that are not obvious: • Holding Stop for at least 3 seconds will force the tape to unthread. • Double-clicking the Fast Forward or Rewind button (pressing the button twice within 500 milliseconds) will cause the tape to wind at the fastest possible speed (approximately 85X play speed) with the capstan disengaged.
APPENDIX 2 USING THE M20 DATA SECTION OF TAPE GENERAL DATA SECTION CONVENTION ON THE M20 The M20 saves setup data to an ADAT tape’s data section using the Alesis BRC Table of Contents (TOC) as a template. In other words, the M20 will only save and recall a TOC for those locate points and parameters that have a BRC equivalent. To save and recall the entire M20 locate point and parameter set, perform a system exclusive MIDI dump (see M20 manual sections 12.4 and 12.5).
Appendix 2, Using The M20 Data Section Of Tape . Song 05/Loc 01 Song 05/Loc 02 Song 05/Loc 03 . . . Song 05/Loc 17 Song 05/Loc 18 Song 05/Loc 19 Song 05/Loc 20 Song 05/Loc 21 Song 05/Loc 22 Song 06 . . . Song 20 ⇔ ⇔ ⇔ Loc 81 Loc 82 Loc 83 ⇔ ⇔ ⇔ ⇔ ⇔ ⇔ Loc 97 (Not Recalled) (Not Recalled) (Not Recalled) (Not Recalled) (Not Recalled) Locates ⇔ (Not Recalled) Locates ⇔ (Not Recalled) Î Ê Only the Song 01 Start Offset is recalled by the M20. Ë The BRC does not save Locate 00 to the data section of tape.
Appendix 2, Using The M20 Data Section Of Tape Auto-Punch/In Auto-Punch/Ot Loop Enable Loop/St Loop/En Auto Input Enable Auto Play Enable Pitch Control Value MIDI/Util/MIDI Device Value Record Xfade/Crossfade Time Rehearse Enable ALESIS M20 REFERENCE MANUAL 1.
Appendix 2, Using The M20 Data Section Of Tape A2-4 ALESIS M20 REFERENCE MANUAL 1.
APPENDIX 3 M20 TRANSPORT & SYSTEM ERROR MESSAGES PLAY STATE ERRORS: "QuarterToPlay ERROR" "Track Skip timeout error" "ERROR: StopPoint default" "CAP SERVO CNTR TIMEOUT 1" If current speed is assumed to be 1/4x when actually not Track skipping not completed within 6 seconds Default case when calculating play stop point Capstan FG error feedback from servo chip is not within range after 2 seconds when transitioning from stop to play BRAKING STATE ERRORS: "BRAKING TIMEOUT ERROR 1" "BRAKING TIMEOUT ERROR 2"
Appendix 3, M20 Transport & System Error Messages WIND STATE ERRORS: "FORWARD TIMEOUT ERROR 1" "REWIND TIMEOUT ERROR 1" "INVALID FWD CONDITION 1" "INVALID REW CONDITION 1" "INVALID FWD CONDITION 2" "INVALID REW CONDITION 2" "INVALID FWD CONDITION 3" "INVALID REW CONDITION 3" “TC wait state invalid” Slowdown time from capstan disengaged fast wind to capstan engaged wind exceeds 3 sec Slowdown time from capstan disengaged fast wind to capstan engaged wind exceeds 3 sec Invalid result of capstan engaged slowe
Appendix 3, M20 Transport & System Error Messages CAPSTAN STATE TRANSITION ERRORS: "CAPSTAN CONSTANTS ERROR" "CAP PWM TO SERVO SWITCH" "NO CAPSTAN FGs ERROR 1" "NO CAPSTAN FGs ERROR 3" "NO CAPSTAN FGs IN JOG" "NOISY CAPSTAN FG" "CAP CAN'T GET TO SPEED 1" "CAP CAN'T GET TO SPEED 2" "CAP SERVO COUNTR TIMEOUT" "RAMP CAP ILLEGAL CASE 1" "RAMP CAP ILLEGAL CASE 2" "RAMP CAP ILLEGAL CASE 3" "RAMP CAP ILLEGAL CASE 4" Default case when loading capstan constants When capstan is not off when switching to servo contro
Appendix 3, M20 Transport & System Error Messages DECK STATE TRANSITION ERRORS: "DECK INIT ERROR" Error in deck mode switch when initializing deck mode Error in deck mode switch during deck monitoring Deck does not reach destination mode within 2 seconds During load, deck didn’t reach unthreaded within 2 seconds Problem with cassette present sensor, load switch, or load motor Problem with cassette present sensor, load switch, or load motor Problem with load switch or load motor After threading tape, end of
Appendix 3, M20 Transport & System Error Messages OTHER ERRORS MESSAGES: "SUPPLY CAN'T USE TIMER 2" "TAKEUP CAN'T USE TIMER 2" "LT CAN'T USE TIMER 2" "CAPSTAN CAN'T USE TIMER 2" "DRUM CAN'T USE TIMER 2" "GET TIMER 2 NOW ERROR" "Search Master is Offline" "Err: Search Master Poll" "ERROR - Dew detected" "ERROR - Write Protected" "Beyond Auto-Punch Region" Takes longer than 3 seconds for supply tach to use timer resource Takes longer than 3 seconds for takeup tach to use timer resource Takes longer than 3 sec
Appendix 3, M20 Transport & System Error Messages A3-6 ALESIS M20 REFERENCE MANUAL 1.
M20 MAJOR FEATURE UPDATE: VERSION 2 Version 2.00 Features RS-422 (SONY 9-PIN) SLAVE OPERATION The Online Source page in the Utility menu now has the “RS-422” parameter added to its choice of online control source settings. Two new utility pages have also been added to facilitate RS-422 slave track arming operations. When Online Source is set to RS-422, the M20 will recognize standard Sony 9-pin control commands. The M20 is optimized for BVU-950 emulation.
M20 Software Version 2 ID 1 OFFLINE WITH THE CADI REMOTE When the CADI remote is connected to multiple M20 recorders, the ID 1 master can now be taken offline. ID 1 maintains clock and serial control over all slaves (excluding 32-bit ABS time code). Using a CADI, when ID 1 is offline, its transport remains idle while the CADI transport controls operate the next online slave (known as the pseudo-master).
M20 Software Version 2 • Using Tape Offset mode. 1. Tape Offset is enabled, ID 2’s tape offset value is non-zero and user tries to take ID 1 offline: ID 1 offline is not allowed and “ID 2 Tape Offset Not Zero” is temporarily displayed. 2. ID 1 is offline, ID 2’s tape offset value is non-zero and the user tries to enable Tape Offset: Tape Offset enable is not allowed and “ID 2 Tape Offset Not Zero” is temporarily displayed. • When ID 1 is put back online, all slaves will stop.
M20 Software Version 2 Note the following exceptions when using tapes previously formatted with v1.xx software: • When a version 1.xx formatted tape has tc recorded to it using version 1.xx software, time code discontinuities and non-contiguities in fast wind will not be recognized. In this case, the M20 will extrapolate time code values when in wind modes (based on the last valid tape tc detected in Play or Record mode). • When a version 1.xx formatted tape has tape tc recorded to it using version 2.
M20 Software Version 2 DIGITAL SCRUB: “DIG SCAN: ON/OFF, NN dB” A Digital Scan page has been added to the Utility pages. This allows the user to have control over digital audio output when in jog/shuttle mode. The output may be attenuated in 6 dB increments (0 dB to –42 dB). Note the following when using Aux Track routing: • Aux routing play back through the “AUX” selected channels is defeated when Digital Scan mode is enabled.
M20 Software Version 2 MIDI THRU “Soft” MIDI Thru (automatically echoing non-F0 commands) is now defeated in order to accommodate a MIDI closed loop more effectively. NEW UTILITY PAGE ORDER The Utility menu page order in version 2.
M20 Software Version 2 DECK STANDBY MODE A deck standby mode has been added as a user-optional transport load condition. Place the M20 in Deck Standby by pressing the Peak Mode and Stop buttons simultaneously. In this mode, the cassette remains loaded in the transport and the tape is completely withdrawn into the cassette. When the tape is withdrawn, the drum is turned off and drum hours do not accumulate.
