digital audio weiss engineering ltd. Florastrasse 42, 8610 Uster, Switzerland +41 1 940 20 06 +41 1 940 22 14 http://www.weiss.ch / http://www.weiss-highend.com GAMBIT EQ1-LP OPERATING MANUAL Software Version: 0S: 5.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP CONTENTS CONTENTS CONTENTS _________________________________________________________________________ 2 FRONT PANEL ______________________________________________________________________ 3 Front Panel Groups ____________________________________________________________________________ 4 INTRODUCTION ____________________________________________________________________ 5 Processing _____________________________________________________________________________
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP FRONT PANEL FRONT PANEL Graph 1: Front Panel Elements Daniel Weiss Engineering Ltd., Florastr. 42, CH-8610 Uster +41 1 940 20 06 +41 1 940 22 14 http://www.weiss.ch Page 3 of 28 weiss@weiss.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP FRONT PANEL Front Panel Groups The front panel of the EQ1 offers several control and display features. These can be grouped according to Graph 1: Front Panel Elements: - Band Parameters - Menu - Controls - Snapshots This manual will explain how to operate the EQ1 according to these groups. The Bypass key is discussed separately in chapter EQ Bypass (p. 15).
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP INTRODUCTION INTRODUCTION Congratulations on purchasing the Weiss Gambit EQ1-LP linear phase digital equalizer! The EQ1-LP is a digital equalizer with a linear phase response. This means that the delay caused by processing is constant across the whole spectrum, unconstrained by eq settings - this is not the case with standard equalizers, where signal delay varies with frequency, depending on the eq setting.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP OPERATION OPERATION The following explanations assume that the equalizer is in power-up mode, i.e. no menu is active. If a menu is active, press the “menu” key repeatedly until the status display appears. Use this value to set the optimal gain for a specific session. Reset it for every session. Status Display Key A Over-Hold Key B Whenever an over is encountered, the boxes to the side of the peak-hold values are marked.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP OPERATION Snapshot Display Bottom line in the status display. Refer to this for information on current workspace and snapshot. There are two workspaces (“A” and “B”) for quick comparison of two equalizer settings. A workspace can be stored to a snapshot for later use. The number of the last recalled snapshot will be displayed.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP Band Parameters What Is A Band? The EQ1 has seven independent bands per channel. A band has the following parameters which can be adjusted separately for each band: OPERATION To activate a band and see its detailed parameter values, touch any knob in a band (see Graph 1, ).
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP Adjusting Band Parameters Controls To adjust boost, Q/ slope or frequency simply turn the corresponding knob (see Table 1). Peaking-Filter Shelve-Filter Cut-Filter OPERATION See Graph 1: Front Panel Elements, . “boost” “Q/ slope” “frequency” set boost set boost - set Q set shape set slope set centre frequency set 3dB frequency set -3dB frequency Table 1 To adjust the mode, activate the band. Press a key (Table 2) to change the mode value.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP Linear Phase The linear-phase feature is enabled by pressing this key. If it is lit, the EQ1-LP is in linear-phase mode, otherwise it is in minimum-phase mode. This mode information is kept in the current workspace, and can also be stored alongside all the other workspace parameters in a snapshot. Each snapshot is thus either linear-phase or a minium-phase (this also counts for A-B workspaces: they can each have their own setting of the mode switch).
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP OPERATION FIR filters are used mainly for applications requiring extremely narrow transition bandwidths combined with no audible distortion (i.e. phase shifts) in the pass band (although a so called pre-echo can become a problem in FIR implementations). Examples (in audio applications) are interpolation filters for sample rate conversion and band-split filters for crossovers.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP M/S Mode A 2-channel stereo signal can be transformed from the L/R (left/right) domain into the M/S (mid/side) domain and back without any signal degradation. In the M/S domain, the two channels representing the stereo signal contain information on the Mid (mono) and Side content of the stereo signal. Equalizing in the M/S domain can, for example, just affect vocals or instruments centred in the stereo mix.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP Snapshots See Graph 1: Front Panel Elements, . Snapshots are copies of the EQ1 parameter settings. This allows recalling complete set-ups including all filter parameters and controls settings. Snapshots can be recalled from the front panel or by remote control (e.g. MIDI Program Change). A-B Comparison You can compare two settings by using the two workspaces “A” and “B”. To toggle between the two press the “A-B” key.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP OPERATION Loading Graph 8: Backup Display Select “Create #1” to save the current snapshots to bank 1. Select “Restore #1” to overwrite the current snapshots with bank 1 (ditto for bank 2). To load a snapshot dump from sequencer, simply play the dump sequence. The EQ1 will automatically switch into receive mode and display statistics about the snapshots it’s receiving.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP Dither The DS1-MK2 v2.0 is able to apply POW-R type dither algorithms to avoid distortion when requantizing from 24bit to 16bit or 20bit output word length (see TECHNICAL DATA for dither specifications). To toggle dither on/off, press key D twice. To see dither status refer to the status display (see Fehler! Verweisquelle konnte nicht gefunden werden. p. Fehler! Textmarke nicht definiert.).
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP Remote Control All band parameters as well as control settings can be set externally. To see remote control status refer to the status display. OPERATION Software Information Press the “menu” key, then select the “System > About” option. This displays a screen with all the relevant information on your EQ1 and how to reach us. Have this page ready when you want to report a problem.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA TECHNICAL DATA AES/EBU Input Sampling Frequencies: Maximum Input Wordlength: Channel Status Data: Channel Status Bits forwarded to AES/EBU output: Connector: 44.1 kHz, 48.0 kHz, 88.2 kHz, 96.0 kHz 24 Bits Input accepts professional or consumer format. see table below XLR female AES/EBU Output Sampling Frequencies: Output Wordlength: Connector: 44.1 kHz, 48.0 kHz, 88.2 kHz, 96.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA The following tables describe how the Channel Status Data bits are generated in the various conversion modes. Output selected: Consumer format. Input: Consumer format. Output: All bits fed forward (transparent), except for: Byte 1: Bits 0..6: 0000000 (category code general) Bit 7: 1 (original) Input: Professional format.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA Output selected: Professional format. Input: Professional format. Output: All bits fed forward (transparent), except for: Byte 2: Bits 0,1,2: 001 (max. sample length= 24bit) Bits 3,4,5: 101 (24 bit word length) Bits 6,7: 00 Input: Consumer format.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA Power Mains Voltage: Fuse rating: Power Consumption: 110 / 220 Volts with voltage selector 500 mA slow blow 40VA max Overload Number of consecutive over-samples to cause “over” display: 1..16 settable Filters The filter topology used in the EQ1 is a very low noise filter structure for a state of the art performance. Daniel Weiss Engineering Ltd., Florastr. 42, CH-8610 Uster +41 1 940 20 06 +41 1 940 22 14 http://www.weiss.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA Parameter Table Frequencies (in Hertz): 13.8, 15.4, 17.3, 19.4, 21.8, 24.5, 27.5, 30.9, 34.6, 38.9, 43.7, 49.0, 50.0, 51.9, 55.0, 58.3, 60.0, 61.7, 65.4, 69.3, 73.4, 77.8, 82.4, 87.3, 92.5, 98.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA Overall Gain: All numbers in dB: -∞, -92.0, -89.0, -86.0, -83.0, -80.0, -77.0, -74.0, -71.0, -68.0, -65.0, -62.0, -59.0, -56.0, -53.0, -50.0, -48.0, 46.0, -44.0, -42.0, -40.0, -39.0, -38.0, -37.0, -36.0, -35.0, -34.0, -33.0, -32.0, -30.0, -29.5, -29.0, -28.5, -28.0, -27.5, -27.0, -26.5, -26.0, -25.5, -25.0, -24.5, -24.0, -23.5, -23.0, -22.5, -22.0, -21.5, -21.0, -20.5, -20.0, 19.5, -19.0, -18.5, -18.0, -17.5, -17.0, -16.5, -16.0, -15.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA Dither Dithering algorithm is implemented using the POW-R set of algorithms. Graph shows the three algorithms at 44.1kHz and 88.2kHz sampling rates each. Graph 9: Output spectrum with 80dBFS / 1kHz sine wave, dithered to 16 Bits, using the three POW-R algorithms at 44.1kHz and 88.2kHz respectively Daniel Weiss Engineering Ltd., Florastr. 42, CH-8610 Uster +41 1 940 20 06 +41 1 940 22 14 http://www.weiss.ch weiss@weiss.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA Remote Control Protocol MIDI Implementation Parameter Remote Control All band parameters plus the controls parameters are remote controllable. Each parameter has its corresponding MIDI controller number. According to the different parameters, the controllers are limited in their range. Invalid values are replaced by the maximum allowable values.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA 0 - 127 CH1 / 2 SELECT Control Change 1011 cccc 01001000 ($48) 0vvv vvvv (cccc) Channel No. (vvvvvvv) New Value: 0, 1 EQ Bypass Control Change 1011 cccc 01001001 ($49) 0vvv vvvv (cccc) Channel No. (vvvvvvv) New Value: 0, 1 Set Ganged Mode Control Change 1011 cccc 01001010 ($4A) 0vvv vvvv (cccc) Channel No. (vvvvvvv) New Value: 0, 1 Toggle A <> B Control Change 1011 cccc 01001011 ($4B) 0vvv vvvv (cccc) Channel No.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA Dump Remote Control All System-Exklusive commands consist of a header, a message type, possible data and the EOS (end of system exclusive).
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA 8 0vvvvvvv OS Version data 9 0vvvvvvv DSP Version 10 0vvvvvvv Scale Version 11 0vvvvvvv Coeff. Version 12 F7 EOS EOS Workspace and Settings request: Byte Value Description Section 1-6 ... ... Header 7 00000110 message = send all parameters as single controler messages Message Type 8 F7 EOS EOS Programming Mode: Note: This command triggers the programming mode in th e EQ1.
OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-LP TECHNICAL DATA RS-232 The implementation is equal to MIDI. Connector Type: D-SUB female, 9 pin, Pinout: pin 1: n.c. pin 2: RS232 output pin 3: RS232 input pin 4: connected to pins 6, 8 pin 5: ground pin 6: connected to pins 4, 8 pin 7: n.c. pin 8: connected to pins 4, 6 pin 9: n.c. RS-422 The implementation is equal to MIDI. Connector Type: D-SUB female, 9 pin, Pinout: pin 1: remote input + pin 2: remote output + pin 3: n.c.
