® Dolby DP570 Multichannel Audio Tool User’s Manual Issue 3 Part Number 91753
Dolby Laboratories, Inc. Corporate Headquarters Dolby Laboratories, Inc. 100 Potrero Avenue San Francisco, CA 94103‐4813 USA Telephone 415‐558‐0200 Fax 415‐863‐1373 www.dolby.com European Headquarters Dolby Laboratories, Inc. Wootton Bassett Wiltshire SN4 8QJ England Telephone (44) 1793‐842100 Fax (44) 1793‐842101 DISCLAIMER OF WARRANTIES: EQUIPMENT MANUFACTURED BY DOLBY LABORATORIES IS WARRANTED AGAINST DEFECTS IN MATERIALS AND WORKMANSHIP FOR A PERIOD OF ONE YEAR FROM THE DATE OF PURCHASE.
Table of Contents List of Figures ......................................................................................................................................viii List of Tables ......................................................................................................................................... xi Chapter 1: Overview 1.1 Analog Monitoring Capabilities......................................................................................................... 1 1.
3.5 Using the Setup Menu.................................................................................................................... 18 3.5.1 Selecting Parameters............................................................................................................. 18 3.5.2 Entering Text.......................................................................................................................... 19 3.5.3 Exiting the Setup Menu........................................................
.3 Using the DP570 with Other Dolby Equipment ..............................................................................45 5.4 Most Important Metadata ...............................................................................................................45 Chapter 6: Using the DP570 in Live Remote Broadcast 6.1 Connecting the DP570 for Live Remote Broadcast ....................................................................... 47 6.2 Typical Tasks .............................................
A.3.5 Generating Test Noise...........................................................................................................68 A.3.6 Increasing the System Volume..............................................................................................68 A.3.7 Measuring SPL ...................................................................................................................... 69 A.3.8 Computing Channel Trims.........................................................................
D.7.3 Lt/Rt Surround Downmix Level............................................................................................102 D.7.4 Lo/Ro Center Downmix Level.............................................................................................. 102 D.7.5 Lo/Ro Surround Downmix Level..........................................................................................103 D.7.6 Surround EX Mode.....................................................................................................
List of Figures Figure 1-1 Figure 2-1 Figure 2-2 Figure 3-1 Figure 3-2 Figure 3-3 Figure 3-4 Figure 3-5 Figure 3-6 Figure 3-7 Figure 4-1 Figure 4-2 Figure 4-3 Figure 4-4 Figure 4-5 Figure 4-6 Figure 4-7 Figure 4-8 Figure 4-9 Figure 4-10 DP570 Functional Block Diagram.......................................................................................... 3 Monitor Configuration Tab ...................................................................................................
List of Figures Figure C-4 Figure C-5 Figure C-6 Figure C-7 Figure C-8 Figure C-9 Figure C-10 Figure C-11 Figure C-12 Figure C-13 Figure D-1 Figure D-2 Figure E-1 Monitor Control Submenu.................................................................................................... 77 Pro Logic II Submenu .......................................................................................................... 77 User Presets Submenu ....................................................................
List of Figures x Dolby® DP570 Multichannel Audio Tool User’s Manual
List of Tables Table 3-1 Table 3-2 Table 3-3 Table 3-4 Table 3-5 Table 3-6 Table 3-7 Table 3-8 Table 4-1 Table 4-2 Table 4-3 Table 4-4 Table 4-5 Table 4-6 Table A-1 Table B-1 Table B-2 Table B-3 Table B-4 Table B-5 Table B-6 Table D-1 Table D-2 Table D-3 Table D-4 Table D-5 Table D-6 Table D-7 Table D-8 Table D-9 Table D-10 Table D-11 Table D-12 Table D-13 Table D-14 Table D-15 Table D-16 Table D-17 Table D-18 Table D-19 Table D-20 Table D-21 Table D-22 Table D-23 Table D-24 Table D-25 Table D-26 Table D-2
List of Tables Table D-28 Metadata Combinations .........................................................................................................
Chapter 1 Overview The Dolby® DP570 provides unprecedented control and reference monitoring for the creation and delivery of Dolby Digital and Dolby E surround sound as well as metadata for DTV and DVDs. The DP570 Multichannel Audio Tool simplifies the preparation of content for Dolby E and Dolby Digital encoding.
Overview Principles of Operation level, Pro Logic decoding, and the other functions controlled by metadata and experienced by consumers. The DP570’s convenient and user‐friendly interface simplifies multichannel audio production and mastering. Figure 1‐1 shows the audio path of the DP570 broken into major functional blocks. Features that control the operation of a block are connected to it by a dotted line.
Emulator Config Spkr select List Mode Metadata Prgm Select Principles of Operation Router Config Overview Output Meter Measurement Point Input Meter Measurement Point L R 1/2 L/R C Emulator 3/4 AES Rcvr x4 Router (DRC, dialnorm, downmix, P/L decode) SW Bass management AES Xmit x4 Ls Rs 5/6 C/ SW Ls/ Rs Bsl Bsl / Bsr Bsr Spkr Trim Vol, Mute 7/8 L 1/2 R 3/4 AES Xmit x4 From router outputs C D/A x8 5/6 Trims x8 Volume Output Bal.
Overview Main Applications The Cat. No. 548 Analog Option Card provides an analog monitor section and some additional features to ease interfacing to existing mixing and monitoring environments. This optional analog monitor section provides features including multiple speaker‐configuration outputs, a master volume control, speaker trim controls, and an input for a console solo bus. 1.
Chapter 2 Getting Started This chapter describes the actions necessary to begin using the DP570 in a basic configuration. 2.1 Unpacking and Inspection Before unpacking the unit, inspect the outer carton for shipping damage. If the carton shows damage, inspect the unit in those areas. Several essential items are provided with the unit, including: • Power cords for use in the United States and continental Europe. • A CD‐R containing the DolbyRemote 570 application and soft copy documentation.
Getting Started Installing the DP570 2.3.1 Venting Dolby® professional audio products are designed to operate within a temperature range of 5°C to 45°C. They use natural convection cooling and therefore should not be mounted directly above any heat‐generating equipment. The DP570 has vent holes in the front and back of the unit, and can be placed directly above or below other rack‐mounted gear. 2.3.2 Making Input Connections Connect the mandatory multichannel PCM signals to the digital jacks.
Getting Started Installing the Remote Software If there is no video input or the video input fails, the DP570 generates a default frame based on 1,536 samples at the current audio clock rate, to match Dolby Digital frame rates. For a discussion of the connector types used for the V Ref connection on the DP570, see Connector Specifications on page 71. 2.3.
Getting Started Installing the Remote Software 2.4.3 Hardware Connection To connect the DP570 to its remote control device, use a serial cable from your computer to either the front‐panel Remote RS-232 port or the rear‐panel Remote RS-485 port. For connector and pin descriptions, see the Front‐Panel Remote Connector on page 71 and the Rear‐Panel Remote Port on page 73. Note: You can use a USB‐to‐serial adapter to connect the serial cable to a laptop.
Getting Started Installing the Remote Software To end remote operation and resume using the front‐panel interface, press Shift then again. 2.4.6 Starting the Remote Software To start the remote software: 1. Double‐click the program icon. 2. Review the communication settings, and modify them if necessary. 3. Click OK. The DP570 alerts you that it is opening the device and, when communication is established, displays the main application screen shown in Figure 4‐1. 2.4.
Getting Started Selecting a Program Configuration Figure 2-1 2.5 Monitor Configuration Tab Selecting a Program Configuration The first step in monitoring is to select a program configuration that reflects the number of channels within the program(s) you will monitor. The DP570 supports 22 program configurations shown in Program Configuration Settings on page 93. The number of channels in the selected program configuration affects the default metadata applied by the DP570.
Getting Started Selecting a Program Configuration Figure 2-2 Program Configuration Selector Dolby® DP570 Multichannel Audio Tool User’s Manual 11
Getting Started 12 Selecting a Program Configuration Dolby® DP570 Multichannel Audio Tool User’s Manual
Chapter 3 Controlling the DP570 As shown in Figure 3‐1, you can control the DP570 in three ways: • Directly, by pushing buttons on the front panel of the unit • Remotely, using the DolbyRemote 570 software over a serial connection to a PC • Remotely, using a hardware remote panel connected to the unit GPI/O connector Note: Direct control and remote control using DolbyRemote 570 are mutually exclusive. You cannot use both the front panel and the remote application at the same time.
Controlling the DP570 Using the Front-Panel Buttons Remote Delete Insert Status Contrast Volume Bypass Figure 3-2 Front-Panel Buttons 3.1.1 Main and Shifted Functions of the Buttons Most of the buttons have two functions: a main function and a shifted function. The main function, indicated on the button itself, is active when the Shift button is not lit. The shifted function is active when the Shift button is pressed and lit.
Controlling the DP570 Menu Structures 3.1.4 Other Shifted Functions When the Shift button is pressed and lit, the other keys have the functions listed in Table 3‐2. Table 3-2 Shifted Key Functions Shift + Key Action Puts the unit in remote mode. Deletes the current character from text fields. Opens the contrast control for the DP570 display, letting you increase or decrease the contrast. Inserts a character at the cursor in text fields. 3.
Controlling the DP570 Monitoring Status Using the Front Panel 1 2 5.1 + 2 Internal 5 4 3 Prog 1 3/2L 27 Figure 3-3 Default Status Menu Screen The main status display includes five elements: 1. Program configuration: can contain any of the supported program configurations listed in Program Configuration Settings on page 93. The example in Figure 3‐3 includes two programs: a 5.1 mix and a two‐channel mix. Metadata for the programs is controlled separately. 2. Metadata source in use.
Controlling the DP570 Monitoring Status Using the Front Panel Basic Status Indicators The indicators shown in Figure 3‐4 display the basic status information listed in Table 3‐4. Delay Lt/Rt Input Metadata Input Solo 1 Figure 3-4 Remote V Ref Fault Error 2 Basic LED Indicators Table 3-3 Basic Status Indications LED Indication and Meaning Delay This LED is not active in this version. Lt/Rt Input Green: Lt/Rt Input mode is active. Off: Inactive Solo Green: Solo input function is active.
Controlling the DP570 Using the Setup Menu Channel Activity L R C LFE Ls Rs Bs 1 Lt 2 Rt 3 4 5 6 7 Figure 3-5 SW Output 8 Input Channel Activity LED Indicators Channel Activity LED indicator meanings are detailed in Table 3‐4. Table 3-4 Channel Activity LED Indications LED Display Signal Status YELLOW Peak signal level is less than –60 dBFS; or no is signal present. GREEN Peak signal level is greater than –60 dBFS and less than –0.1 dBFS; a signal is present and not clipping.
Controlling the DP570 Using the Setup Menu If the cursor is flashing after an option value, that option is not currently selected. Press Enter to select it. Pressing Esc at an option with the flashing cursor displayed returns the display to the selected value. 3.5.2 Entering Text In certain situations you will be prompted to enter text. In the text entry window, the first line prompts you to enter text.
Controlling the DP570 Using the GPI/O Connector 3.5.6 Analog Output Master Volume Press Shift, Enter to access the master volume control for the optional analog outputs. Use the arrow buttons to adjust the volume. Press Enter to keep the current value and return to the previous menu, or press Esc to restore the initial value. Any adjustment you make takes effect immediately. 3.6 Using the GPI/O Connector You can use this port to connect the DP570 to your studio console or existing control equipment.
Controlling the DP570 Using the GPI/O Connector Table 3-6 GPO Functions Available Function Polarity Trigger Active State Description Either Either Mute Indicates Mute is active. Speaker Select (Multi, Stereo, Mono) Either Either Speaker selected Indicates which speaker is selected. Program Select (1–8) Either Either Enabled Indicates which program is selected. Preset Select (1–32) Either Either Enabled Indicates which preset is selected.
Controlling the DP570 Using the GPI/O Connector Table 3-7 GPI Functions Available Function Polarity Trigger Active State Description Program Select (1–8) Either Either Enabled Indicates which program is selected. Preset Select (1–32) Either Either Enabled Indicates which preset is selected. Downmix Mode (Full, Stereo, Mono, Phant, 3‐Stereo) Either Either Enabled Indicates which mode is selected.
Controlling the DP570 Using the GPI/O Connector Table 3-8 GPI/O Pins Available Pin 6 Function Solo control inputa Pin Function 24 User‐defined input High polarity Level‐triggered Active state: Engaged 7 User‐defined output 25 User‐defined input 8 User‐defined output 26 User‐defined input 9 User‐defined output 27 User‐defined input 10 User‐defined output 28 User‐defined input 11 User‐defined output 29 User‐defined input 12 User‐defined output 30 User‐defined input 13 User‐de
Controlling the DP570 Using the GPI/O Connector The Function menu lets you assign a function to the pin you have selected.
Chapter 4 Using the DP570 Features This chapter covers each distinct feature of the DP570 in detail. The main power of the Dolby® DP570 is its ability to accept any program input and play it back over any combination of speaker outputs using any combination of metadata parameters. This main power is backed up by its ability to adjust virtually any of those variables on the fly.
Using the DP570 Features Generating and Adjusting Metadata 4.3.1 Choosing the Source of Metadata Normally you will use an entire metadata stream from one source, but that is not required. You control this source choice at three levels: 1. You choose a program configuration. This defaults all parameters for all programs in the stream to the source you chose: internal, external 1, or external 2.
Using the DP570 Features Generating and Adjusting Metadata Table 4-1 Metadata Parameter Defaults 5.
Using the DP570 Features Generating and Adjusting Metadata Example 1—Overriding an Individual Parameter Value We’ll assume you are using an external metadata stream. The output of the DP570 is feeding a DP571 or DP569. You want to add a compression profile because none was originally included. To do so: 1. Select the program you wish to change. 2. Click the Dynamic Range metadata tab on the DolbyRemote 570. 3.
Using the DP570 Features Troubleshooting Metadata Problems In Out DP563 2 Digital Output Digital Input 6 Router Output 8 DP570 DP572 Metadata Out 5.1 Metadata In Metadata Out Digital Input DP571 5.1+2 Metadata In Metadata Adjustment • Change Program Config to 5.1+2 (internal source) • Set parameters for new two-channel program Figure 4-2 4.4 Adding a Second Program Troubleshooting Metadata Problems The DP570 has several status indicators to help troubleshoot metadata‐related problems.
Using the DP570 Features 4.6 Monitoring Downmixes Monitoring Downmixes The DP570 allows you to audition various downmixes before finalizing the content. Previewing downmix conditions is essential in providing the best possible audio quality in listening environments with fewer speakers. Select a Downmix mode and make necessary adjustments to the metadata or the source mix accordingly.
Using the DP570 Features Measuring and Setting the Dialogue Level characters with different vocal qualities. In programs without dialogue, such as a music concert, sections of average level need to be identified. With representative audio clips identified, you can use the DP570 to set the dialogue level parameter. You can use either the software interface or the front‐panel buttons; for this operation we describe using the software interface first. 4.7.
Using the DP570 Features Measuring and Setting the Dialogue Level This process allows you to accurately estimate the average level of all of the individual dialogue sections.1 The term representative section indicates a shorter section of the program being measured that contains spoken dialogue levels that are representative of the speech levels found throughout the entire program.
Using the DP570 Features Measuring and Setting the Dialogue Level the short‐term measurement, as they find the information on near‐term dynamics to be very useful when mixing or producing a program. These operators are capable of managing overall program loudness by continuously reading and interpreting the short‐term measure2. Table 4‐2 lists several example applications for both measurement modes.
Using the DP570 Features Setting Dynamic Range Control 3. The default measurement mode is Infinite. Click the Infinite or Short Term button to move back and forth between the modes. The software displays the level of the audio clip. This level is displayed until you start a new measurement or change modes. 4. Repeat these steps with each audio clip selected. The DP570 should return similar values for each of the clips.
Using the DP570 Features User Presets 4.10 User Presets You can save system settings in up to 32 separate presets for quick recall in the Setup User Presets window shown in Figure 4‐7. You can store authoring‐only subsets, emulator‐only setting subsets, and combinations that recall both emulator and authoring settings at once.
Using the DP570 Features Using Lt/Rt Input Mode 4.10.2 Emulator-Only Presets Emulator presets are particularly useful for checking specific combinations of downmix and compression modes, perhaps on a different speaker output. For example, you can audition current metadata settings for a 5.
Using the DP570 Features Channel Mapping and Input Routing For an example of monitoring a Dolby Surround program while creating metadata for a 5.1‐channel program, see Using the DP570 in Postproduction on page 53. 4.12 Channel Mapping and Input Routing Table 4‐3 shows how the DP570 routes input channels to emulator output channels. Channel mapping changes automatically according to the program configuration, and reflects how the channels will be connected to a Dolby Digital encoder.
Using the DP570 Features Using an External Shaft Encoder to Control Master Volume Note: The only four‐channel mode supported is 3/1. If you wish to use 2/2 channel mode, we recommend setting the program configuration to 5.1 and muting the unnecessary channels. The DP570 input router enables you to reroute input channels to conform to the automatically assigned channel mapping. The input router is active even when Emulator Bypass is enabled.
Using the DP570 Features Emulator Bypass Table 4‐6 describes the electrical characteristics. Table 4-6 Shaft Decoder Signal Electrical Characteristics Characteristic Min Max VT+ Positive‐going input threshold voltage 1.2 V 2.1 V VT– Negative‐going input threshold voltage 0.5 V 1.4 V VH Hysteresis voltage 0.4 V 1.5 V 4.14 Emulator Bypass When you enable Emulator Bypass, the front‐panel Esc button is illuminated. In this mode, the only settings that affect the output are the router settings.
Using the DP570 Features Sticky Settings 4.17 Sticky Settings When you enable Sticky Settings, your last settings for dynamic range control profiles, downmix, speaker selection, LFE monitor, master volume, and emulator bypass for your listening environment remain with each program when you leave one program to monitor another. This allows you to switch to another program, monitor that program, then return to the original program without losing the settings you had chosen for the original program.
Using the DP570 Features Dolby Pro Logic II Support The master Volume slider allow you to raise or lower the volume of all the outputs simultaneously. Figure 4-10 Master Trim Control Figure 4-11 Master Volume Control 4.21 Dolby Pro Logic II Support The DP570 supports four Pro Logic II modes: Movie, Music, Pro Logic, and Matrix. Panorama, Dimension, and Center Width offer a variety of settings activated in Music mode. Movie mode is the standard setting for programs with video.
Using the DP570 Features Dolby Pro Logic II Support Panorama mode sends the stereo signal to the surround speakers as well as the front Left and Right. The Panorama setting is disregarded if the Pro Logic II mode is anything other than Music. Dimension adjusts the focus of the signal from the front speakers to the rear speakers. If the Pro Logic II mode is anything other than Music, the Dimension setting is read as 0 (Center).
Chapter 5 Using the DP570 in DVD Mastering During the DVD mastering process, it is important to experience the program in the same way a viewer will in the home so that you can assess the quality of the mix and make appropriate adjustments. The DP570 provides a quick and accurate listening environment emulation. The instructions in this section allow you to use the DP570 to respond quickly with necessary changes and improvements. 5.
Using the DP570 in DVD Mastering Typical Tasks 5.2.1 Setting the Dialogue Level As the mix is nearing completion, use the dialogue level indicators in DolbyRemote 570 shown in Figure 5‐2 during a representative period of speech to select the Dialogue Level value for the program. The measured value of the audio program appears in yellow; the Dialogue Level value set in the software appears in green.
Using the DP570 in DVD Mastering Using the DP570 with Other Dolby Equipment 5.2.3 Monitoring Downmixes Once dialnorm has been set and a measurement mode selected, check downmixes and make any adjustments necessary so that the mix translates best across the appropriate listening environments. A full dynamic range 5.1 mix may sound more pleasing than the same mix that is stereo or Pro Logic downmixed. In some cases, a compromise on downmixes must be made to ensure that the 5.1 mix remains the best.
Using the DP570 in DVD Mastering Most Important Metadata 3. Dialogue level: the dialnorm parameter. Compare the measured value (shown in yellow numbers) to the dialnorm metadata parameter value (shown in green numbers) periodically as you work. 4. Compression mode: select one that sounds best; None is not recommended as it may cause peak limiting in a consumerʹs decoder during downmixing. For more information on compression modes, see Setting Dynamic Range Control on page 34. Set it once for each program.
Chapter 6 Using the DP570 in Live Remote Broadcast In preparation for and during a live remote broadcast, it is important to experience the audio program the same way a viewer will in the home so you can assess the mix quality and make appropriate adjustments. The DP570 provides quick and accurate emulation of a viewerʹs listening environment. The instructions in this section allow you to use the DP570 to respond quickly with necessary changes and improvements. 6.
Using the DP570 in Live Remote Broadcast Typical Tasks LM100 DP571 Mixing Console Main Out Metadata In Main In Dolby E Video Ref DP570 PCM Delay Input Metadata Out 1/2 5/6 7/8 Digital Audio Inputs Digital Thru Dolby E 3/4 1/2 Digital Audio Inputs 3/4 5/6 7/8 Video Ref Lt/Rt In 1/2 Analog Outputs MPEG Encoder 3/4 5/6 DP563 Lt/Rt Lt/Rt Video Main Out Distribution Amplifier 5.1-Channel Monitor Rs R L/R C/LFE C Digital In L Ls/Rs Figure 6-1 6.
Using the DP570 in Live Remote Broadcast Figure 6-2 Typical Tasks Typical Downmix Parameters Further, you can assess whether the announcerʹs voice will survive during a Pro Logic® or Pro Logic II decode from a stereo downmix by selecting Pro Logic while downmixing to stereo. While assessing the mix during downmixing, the mixer can make adjustments in order to ensure that the 5.1 mix provided will sound good in all manner of home environments, from mono to stereo to 5.1. 6.2.
Using the DP570 in Live Remote Broadcast Using the DP570 with Other Dolby Equipment 6.2.2 Monitoring the Dialogue Level As you work, check the dialogue level indicators—the yellow numbers shown in Figure 6‐3—frequently. Make adjustments to the mix to keep the dialogue level value (during periods of representative speech) within a few decibels of your target. 6.2.
Using the DP570 in Live Remote Broadcast 6.6 • Lt/Rt center downmix level • Lt/Rt surround downmix level • Lo/Ro center downmix level • Lo/Ro surround mix level Importance of Presets Importance of Presets In a live broadcast situation, the ability to preview metadata parameters is limited. The DP570 presets are therefore very valuable.
Using the DP570 in Live Remote Broadcast 52 Importance of Presets Dolby® DP570 Multichannel Audio Tool User’s Manual
Chapter 7 Using the DP570 in Postproduction The DP570 can be used in a variety of postproduction settings. We discuss one example. The instructions in this section allow you to use the DP570 to respond quickly with necessary changes and improvements to the mix. 7.1 Connecting the DP570 In the example shown in Figure 7‐1, the mixing console is used to create a 5.1‐channel mix, which is then fed to the DP570.
Using the DP570 in Postproduction 7.2 Typical Activities Typical Activities The DP570 is used in the monitor chain to emulate consumerʹs listening environment. 7.2.1 Measuring Dialogue Level As the mix is nearing completion, use the dialogue level indicators during a representative period of speech to determine and select the Dialogue Level value for the program. The measured value from program material appears in yellow numbers (–26 in Figure 7‐2).
Using the DP570 in Postproduction Using the DP570 with Other Dolby Equipment Identified Clips on page 31 for more information on these modes and to understand the differences between them. 7.2.3 Monitoring Downmixes Once dialnorm has been set and a measurement mode selected, check downmixes and make any adjustments necessary so that the mix translates best across the appropriate listening environments. A full dynamic range 5.
Using the DP570 in Postproduction 7.4 Most Important Metadata Most Important Metadata The following highest‐priority parameters have the greatest impact on your work. We suggest you address them in this order: 1. Program configuration: the number of type of programs included in the Dolby E stream. 2. Channel mode: the number of audio channels in the program; set it once for each program. Note: Ensure that these parameters are set correctly because other parameters depend on them. 3.
Chapter 8 Using the DP570 in Master Control Dolby® E encoding is commonly used to distribute multichannel audio from a network center to multiple affiliate stations, usually via satellite or optical fiber. The DP570 provides quick and accurate emulation of multiple listening environments during Dolby E encoding. 8.
Using the DP570 in Master Control Typical Activities DP571 Metadata In Video Ref VTR Server or IRD DP572 Digital Audio Outputs Master Control Metadata Out Metadata In Metadata Out 1/2 3/4 MPEG Encoder Main In Dolby E Digital Audio Inputs 5/6 Audio Main 3/4 In Video Ref 1/2 Digital Audio Outputs 3/4 5/6 DP570 1/2 3/4 5/6 Digital Audio Inputs Metadata Out Video Ref Metadata In Router Outputs Figure 8-1 8.2 5.
Using the DP570 in Master Control Figure 8-2 Typical Activities Typical Downmix Options Or, if a viewer complains about the audio quality on a mono television when viewing a 5.1 program, the MC operator can quickly select Mono in the Downmix section, and RF to emulate the viewerʹs listening conditions. 8.2.
Using the DP570 in Master Control 8.3 Using Unity Gain Mode Using Unity Gain Mode Unity Gain mode should be off to best emulate a consumerʹs listening experience. To compare between off‐air (for example consumer emulation) and preview signals, Unity Gain mode may be enabled. Refer to Unity Gain Mode on page 39 for more information. 8.4 Using the DP570 with Other Dolby Equipment The Cat. No. 549 Dolby GPI/O Controller provides a quick method to change downmix and compression modes while monitoring. 8.
Appendix A Configuring a Monitor System Configuring the monitor system to establish a balance between all channels and to ensure that all speakers play back at the correct level relative to the listening reference position is a complex task that must be done correctly to achieve optimal results. The steps required to set up your listening environment are: 1. Assigning Monitor System Configuration Settings on page 61 2. Setting Delay Values on page 65 3. Calibrating Speaker Playback Levels on page 67 4.
Configuring a Monitor System Figure A-2 Assigning Monitor System Configuration Settings Monitor Setup Tab A.1.2 Selecting Analog Outputs The system automatically detects the presence of the Cat No. 548 Analog Outputs Card, and checks the Analog Outputs box when it is present. Uncheck the box if you do not wish to use them. If you uncheck the box, all the settings in this area will be grayed out and unavailable. A.1.3 Choosing Bass Management Settings If you have a 5.
Configuring a Monitor System Assigning Monitor System Configuration Settings • If you have small Center and Surround speakers, direct the low frequencies from those channels to the Left, Right, or Subwoofer outputs. • If no subwoofer is available, redirect the LFE channel to the Left and Right channel decoder outputs. Bass Management This option determines how low frequencies are directed in the monitor system.
Configuring a Monitor System Figure A-3 Assigning Monitor System Configuration Settings Bass Management Settings A.1.4 Choosing Back Surround Speakers The setting records the number of back surround speakers you have in your monitoring system. The default is None. If this not correct, click either 1 or 2. A.1.5 Emulator Reversion This setting is not active in the current version. A.1.6 Setting the Lt/Rt Gain This is an input trim for the separate Lt/Rt Input. The default value is 0 dB.
Configuring a Monitor System Figure A-5 Setting Delay Values Pro Logic II Controls 3. Click Enabled to turn Panorama on. It is disabled by default. A.2 Setting Delay Values For optimal performance, signals from all the speakers should arrive at the reference listening position simultaneously. This is accomplished by assigning delays to each speaker. Measure and record the distance from the reference listening position to each of the following speakers.
Configuring a Monitor System Setting Delay Values A.2.1 Calculating Delay Values Center Delay L minus C (L – C) equals the Center delay setting in milliseconds. For example, if C is 2 feet less than L or R, set Center delay to 2 ms. If C is three feet more than L or R, set Center delay to –3 ms. If C = L = R, set Center delay to 0 ms.
Configuring a Monitor System A.3 Calibrating Speaker Playback Levels Calibrating Speaker Playback Levels The following sections discuss and illustrate the steps in speaker calibration in the order they should be performed. Normally this entire process need only be executed once for each set of monitor speakers. We do recommend periodic checks to verify that current settings are still appropriate. A.3.
Configuring a Monitor System • Calibrating Speaker Playback Levels For music mixing, each speaker channel should be set to the same SPL (the same as television mixing). There is no standard practice for reference levels for music mixing. Some engineers prefer to mix louder than others do, but if the levels between channels are correct, the overall level is not as important.
Configuring a Monitor System Calibrating Speaker Playback Levels A.3.7 Measuring SPL To accurately measure SPL: 1. Sit in the reference listening position. Set the SPL meter to C weighting and Slow response. 2. Facing the front speakers, hold the SPL meter at chest level, with the microphone facing up at an angle of approximately 45 degrees to the Center speaker. Keep the meter at arm’s length to prevent measuring audio that may reflect from your body. 3. Keep the SPL meter in this position.
Configuring a Monitor System Assigning a Dim Setting +10 dB datum LFE Channel +10 dB Center channel Figure A-9 0 dB datum Real-time Analyzer (RTA) Display If an RTA is not available, setting the LFE channel higher (e.g., 89 dBc for the Subwoofer channel when the Center channel measures 85 dBc), can give an approximate level with an SPL meter. This level varies with the quality of the meter being used.
Appendix B Connector Specifications This appendix gives specifications and pinouts for all the connectors used on the DP570, and the cables that can be used to connect to it. B.1 Front-Panel Remote Connector Table B‐1 shows the pinout for the front‐panel RS‐232 connector.
Connector Specifications B.4 Video Ref Video Ref The Video Ref connections are BNC unbalanced female connectors that receive NTSC composite programs or color black video. Signal levels are compliant with SMPTE 154 specifications. Two connectors are provided in parallel to provide loop‐through capability. This input does not supply a clock signal to the unit but rather allows the metadata output to maintain sync with a video reference. B.
Connector Specifications Rear-Panel Remote Port Table B-3 Metadata Output Port Pinout <~Figure>(continued) Pin Connection 6 Ground 7 RX B asynchronous data outa + 8 TX A asynchronous data ina – 9 Shield a. See the note on DCE equipment on page 71. B.8 Rear-Panel Remote Port This is a 9‐pin female RS‐485 D‐connector. The pinout is SMPTE 207M electrical/mechanical specification compatible.
Connector Specifications Stereo/Mono/Solo Analog Output Table B-5 Multichannel Analog Output Pinout Pin Connection Pin Connection 5 Rs Ground 18 Ls + Out 6 Ls – Out 19 Ls Ground 7 Subwoofer + Out 20 Subwoofer – Out 8 SW Ground 21 Center + Out 9 Center – Out 22 C Ground 10 Right + Out 23 Right – Out 11 R Ground 24 Left + Out 12 Left – Out 25 L Ground 13 No Connection B.11 Stereo/Mono/Solo Analog Output This is a 25‐pin female D‐connector.
Appendix C Front-Panel Menus This appendix illustrates the front‐panel menus as trees, divided into subsections for clarity. The Setup menu begins on this page. The Status menu is shown in Status Menu on page 82. Use the navigation buttons, described and illustrated in Using the Front‐Panel Buttons on page 13, to navigate these menus. C.
Front-Panel Menus C.3 Metadata Params Submenu Metadata Params Submenu Metadata Params Dialogue Lev Metadata Params Srnd Ph Shift Dialogue Lev –27 dB Srnd Ph Shift Enable Parameter Selection Order 1. Dialogue Lev 2. Channel Mode 3. LFE Channel 4. Bitstrm Mode 5. Line Mode Pro 6. RF Mode Pro 7. RF Ov Protect 8. Dolby Srnd 9. Audio Prod Info 10. Mixing Level Figure C-2 C.4 21. DC Filter 22. Lowpass Filt 23. LFE Filter 24. Srnd 3dB Attn 25.
Front-Panel Menus C.
Front-Panel Menus C.6 User Presets Submenu User Presets Submenu User Presets Recall Preset User Presets Save Preset Recall Preset 01X Preset Name Save Preset Preset 01 Enter Type All Save Preset Preset 32 Enter Type Authoring Enter Type Emulator Enter Name Preset Name Save Preset ENTER=Yes ESC=No to User Presets/ Save Preset menu Figure C-6 C.
Front-Panel Menus I/O Control Submenu C.7.
Front-Panel Menus C.
Front-Panel Menus Monitor Config Submenu C.8.
Front-Panel Menus C.9 Status Menu Status Menu 5.1+2 Internal Program 3/2 27 This main screen displays the selected program configuration, the metadata source, the program number being monitored, its acmod, and its dialnorm Master Volume Metadata Params Enter to View Press Enter to view current metadata values. Values cannot be changed on this menu. Video Ref Audio Input User Preset Error Status Enter to View Press Enter to view existing errors. Errors cannot be corrected on this menu.
Appendix D A Guide to Dolby Metadata Metadata provides unprecedented capability for content producers to deliver the highest quality audio to consumers in a range of listening environments. It also provides choices that allow consumers to adjust their settings to best suit their listening environments.
A Guide to Dolby Metadata Metadata Overview Dolby E is a professional technology used for broadcast applications, such as program origination and distribution; the Dolby E bitstream carries the entire metadata parameter set.
A Guide to Dolby Metadata Metadata Overview There are two functional classifications of metadata: Professional—These parameters are carried only in the Dolby E bitstream. They are used to automatically configure a downstream Dolby Digital encoder, allowing maximum control by the content producer over how the encoded bitstream is treated at each step on the way to the consumer’s decoder. Consumer—These parameters are carried in both the Dolby E and the Dolby Digital bitstream.
A Guide to Dolby Metadata Dialogue Level Table D-1 Profession and Consumer Metadata Types <~Figure>(continued) Metadata Parameter Professional Lowpass Filter x LFE Lowpass Filter x Surround 3 dB Attenuation x Surround Phase Shift x Consumer a. Extended Bitstream Information parameters are shown in italics. Special Parameters There are professional parameters in the Dolby E bitstream that are not under direct user control, such as Timecode and Pitch Shift.
A Guide to Dolby Metadata Dialogue Level listening environments, and is essential in any content production, whether it is for transmission in a broadcast stream or for direct distribution to consumers, as with DVDs. Note: Programs without dialogue, such as an all‐music program, still require a careful setting of the Dialogue Level parameter. When setting the parameter for such content, it is useful to compare the program to the level of other programs.
A Guide to Dolby Metadata D.3 Dynamic Range Control Dynamic Range Control Different home listening environments present a wide range of requirements for dynamic range. Rather than simply compressing the audio program at the transmission source to work well in the poorest listening environments, Dolby Digital encoders calculate and send Dynamic Range Control (DRC) metadata with the signal. This metadata can then be applied to the signal by the decoder to reduce the signal’s dynamic range.
A Guide to Dolby Metadata Dynamic Range Control Profiles devices are usually downmixing (for example, when receiving a 5.1‐channel signal). However, in these products, the consumer may have a choice between Line mode and RF mode. RF Mode In RF mode, high‐ and low‐level compression scaling is not allowed. When RF mode is active, that compression profile is always fully applied.
A Guide to Dolby Metadata Downmixing • Film Standard Max Boost: 6 dB (below –43 dB) Boost Range: –43 to –31 dB (2:1 ratio) Null Band Width: 5 dB (–31 to –26 dB) Early Cut Range: –26 to –16 dB (2:1 ratio) Cut Range: –16 to +4 dB (20:1 ratio) • Music Light (No early cut range) Max Boost: 12 dB (below –65 dB) Boost Range: –65 to –41 dB (2:1 ratio) Null Band Width: 20 dB (–41 to –21 dB) Cut Range: –21 to +9 dB (2:1 ratio) • Music Standard Max Boost: 12 dB (below –55 dB) Boost Range: –55 to –31 dB (2:1 ra
A Guide to Dolby Metadata Downmixing As with stereo mixing where the mix is monitored in mono on occasion to maintain compatibility, multichannel audio mixing requires the engineer to reference the mix to fewer speaker channels to ensure compatibility in downmixing situations.
A Guide to Dolby Metadata Parameter Definitions stream to either a downstream decoder or an integrated amplifier with Dolby Digital decoding. In each of these devices, the analog stereo output is one of two different stereo downmixes. One type is a stereo‐compatible Dolby Surround downmix, of the multichannel source program that is suitable for Dolby Surround Pro Logic® decoding. This kind of downmix is also called Pro Logic or Left total/Right total (Lt/Rt).
A Guide to Dolby Metadata Parameter Definitions metadata stream without Extended BSI parameters, and Extended BSI parameters translate seamlessly to decoders that read only universal parameters. Note: Universal parameters include both professional and consumer metadata.Table D‐1 on page 85 distinguishes between professional consumer parameters. D.6.
A Guide to Dolby Metadata Parameter Definitions Dialogue Level The Dialogue Level parameter is discussed in Dialogue Level on page 86. Channel Mode This parameter (also known as Audio Coding mode) indicates the active channels within the encoded bitstream and affects both the encoder and consumer decoder.
A Guide to Dolby Metadata Parameter Definitions Channel parameter can be set. You must have at least three channels to be able to add an LFE channel. Table D-5 LFE Channel Settings LFE Channel Setting Enabled Disabled Bitstream Mode This parameter describes the audio service contained within the Dolby Digital bitstream.
A Guide to Dolby Metadata Parameter Definitions Table D-6 itstream Mode Options Bitstream Mode Setting Definition Assc. Commentary (C) This is typically a single‐channel program intended to convey additional commentary that can be optionally decoded along with the main audio service. This service differs from a dialogue service because it contains an optional, rather than a required, dialogue channel. The C service may also be a complete mix of all program channels, comprising up to six channels.
A Guide to Dolby Metadata Parameter Definitions parameter during downmixing in Lo/Ro mode when Extended BSI parameters are not active. Table D-8 Center Downmix Level Settings and Definitions Center Downmix Level Setting Definition 0.707 (–3 dB) default The Center channel is attenuated 3 dB and sent to the Left and Right channels. 0.596 (–4.5 dB) The Center channel is attenuated 4.5 dB and sent to the Left and Right channels. 0.
A Guide to Dolby Metadata Parameter Definitions Audio Production Information This parameter indicates whether the mixing level and room type values are valid. Yes indicates that a receiver or amplifier can use these values. No indicates that these values are invalid. In practice, only high‐end consumer equipment implements these features. Table D-11 Audio Production Information Settings and Definitions Audio Production Information Setting Definition Yes Mixing Level and Room Type parameters are valid.
A Guide to Dolby Metadata Parameter Definitions Copyright Bit This parameter indicates whether the encoded Dolby Digital bitstream is copyright protected. It has no effect on Dolby Digital decoders and its purpose is purely to provide information. Table D-14 Copyright Bit Settings Copyright Bit Setting Yes No Original Bitstream This parameter indicates whether the encoded Dolby Digital bitstream is the master version or a copy.
A Guide to Dolby Metadata Parameter Definitions it prevents aliasing on decoding and is normally switched on. This parameter is not passed to the consumer decoder. Table D-17 Lowpass Filter Setting Lowpass Filter Setting Enabled Disabled LFE Lowpass Filter This parameter determines whether a 120 Hz eighth‐order lowpass filter is applied to the LFE channel input of a Dolby Digital encoder prior to encoding. It is ignored if the LFE channel is disabled. This parameter is not sent to the consumer decoder.
A Guide to Dolby Metadata Extended Bitstream Information Parameters Digital program is decoded to 5.1 channels, but it provides an Lt/Rt output that can be decoded with Pro Logic to L, C, R, S, if desired. Note: This parameter should always be turned off when you are working with steady state tones for testing purposes; calibration discs for example.
A Guide to Dolby Metadata Extended Bitstream Information Parameters D.7.2 Lt/Rt Center Downmix Level This parameter indicates the level shift applied to the Center channel when adding to the left and right outputs as a result of downmixing to an Lt/Rt output. Its operation is similar to the center downmix level in the universal metadata Table D-22 Lt/Rt Center Downmix Level Setting Lt/Rt Center Downmix Level Setting 1.414 (+3.0 dB) 1.189 (+1.5 dB) 1.000 (0.0 dB) 0.841 (–1.5 dB) 0.707 (–3.0 dB) 0.595 (–4.
A Guide to Dolby Metadata Extended Bitstream Information Parameters Table D-24 Lo/Ro Center Downmix Level Setting Lo/Ro Center Downmix Level Setting 1.000 (0.0 dB) 0.841 (–1.5 dB) 0.707 (–3.0 dB) 0.595 (–4.5 dB) 0.500 (–6.0 dB) 0.000 (–999 dB) D.7.5 Lo/Ro Surround Downmix Level This parameter indicates the level shift applied to the Surround channels when downmixing to an Lo/Ro output.
A Guide to Dolby Metadata Metadata Combinations D.7.7 A/D Converter Type This parameter allows audio that has passed through a particular A/D conversion stage to be marked as such, so that a decoder may apply the complementary D/A process. Table D-27 A/D Converter Type Setting A/D Converter Type Setting Standard HDCD D.8 Metadata Combinations Table D‐28 provides examples of combinations of parameters that could be used as a preset.
A Guide to Dolby Metadata Metadata Combinations Table D-28 Metadata Combinations <~Figure>(continued) Action Film (5.1) Parameter Drama (Lt/Rt) Local News (Mono) Music (5.0) Live Sporting Events (5.0) Copyright Yes Yes Yes Yes Yes Original Bitstream Yes Yes Yes Yes Yes Preferred Stereo Downmix Lt/Rt Preferred Lt/Rt Preferred N/A Lo/Ro Preferred Lt/Rt Preferred Lt/Rt Center Downmix Level –0.707 (–3 dB) 1.0 (0 dB) N/A –0.707 (–3 dB) N/A Lt/Rt Surround Downmix Level –0.
A Guide to Dolby Metadata 106 Metadata Combinations Dolby® DP570 Multichannel Audio Tool User’s Manual
Appendix E Regulatory Notices and Fuse Information This appendix contains important safety information required in the United States, Canada, the United Kingdom and the European Union. It also contains important information on the safe replacement of fuses. E.1 Regulatory Notices E.1.1 USA 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.
Regulatory Notices and Fuse Information Regulatory Notices 13. On some equipment, the appliance coupler (power cord) is used as the mains disconnect device and should be readily accessible and free from obstacles. 14. Refer all servicing to qualified service personnel.
Regulatory Notices and Fuse Information Regulatory Notices Warning: Check that the correct fuses have been installed. To reduce the risk of fire, replace only with fuses of the same type and rating. See Fuse Information on page 111 for more information on fuses. Important – Safety Notice Great Britain This unit complies with the safety standard EN60065. The unit shall not be exposed to dripping or splashing and no objects filled with liquids, such as coffee cups, shall be placed on the equipment.
Regulatory Notices and Fuse Information Regulatory Notices • Die Sicherungen müssen in Typ und Stromwert mit den Angaben auf dem Gerät übereinstimmen. • Die Erdung des Gerätes muß über eine geerdete Steckdose gewährleistet sein. • Das mitgelieferte Netzkabel muß wie folgt verdrahtet werden: • Phase—braun • Nulleiter—blau • Erde—grün/gelb Norme Di Sicurezza – Importante Italia Questa apparecchiatura è stata costruita in accordo alle norme di sicurezza EN60065.
Regulatory Notices and Fuse Information Product End-of-Life Information utrustningen. För att garantera säkerheten och gardera mot eventuell elchock eller brandrisk, måste följande observeras: • Kontrollera att spänningsväljaren är inställd på korrekt nätspänning. • Kontrollera att säkringarna är av rätt typ och för rätt strömstyrka så som anvisningarna på enheten föreskriver. • Enheten måste vara jordad genom anslutning till ett korrekt kopplat och jordat el‐uttag.
Regulatory Notices and Fuse Information Fuse Information E.3.1 Main Fuse The main fuse rating is T 1A L (1 amp, 250 V, 20 mm, time‐lag, low breaking capacity) for all operating voltages. Warning: The power to the unit must be off when the following steps are performed. Ensure that the main power cable to the unit is not connected to a power source. To inspect or replace the main fuse: 1. Open the fuse compartment door in the AC power input housing with a small flat‐blade screwdriver. See Figure E‐1.
Index A/D Converter Type .............................................. 104 Analog Output Master Volume ............................. 20 Applications Digital Television ................................................ 4 DVD Mastering .......................................4, 43–46 Live Remote Broadcast............................... 47–51 Master Control............................................. 57–60 Postproduction ............................................ 53–56 Audio Production Information .........
Unity Gain Mode .............................................. 50 Lo/Ro Center Downmix Level .................................. 102 Surround Downmix Level ............................. 103 Lowpass Filter........................................................... 99 Lt/Rt Center Downmix Level .................................. 102 Input Mode ........................................................ 36 Surround Downmix Level ............................. 102 Lt/Rt Gain .........................................
Surround 3 dB Attenuation .................................. 100 Surround Downmix Level ...................................... 97 Surround EX Mode ................................................ 103 Surround Phase Shift ............................................. 100 System Requirements ................................................ 7 Target SPL ................................................................. 67 Timecode ...................................................................
