Dolby Lake Processor System Manual. Issue 5 Part Number For users of firmware v.5.1

Transcription

1 Dolby Lake Processor System Manual Issue 5 Part Number For users of firmware v.5.1

2 Dolby Laboratories, Inc. Corporate Headquarters Dolby Laboratories, Inc. 100 Potrero Avenue San Francisco, CA USA Telephone Fax European Headquarters Dolby Laboratories, Inc. Wootton Bassett Wiltshire SN4 8QJ England Telephone Fax 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. THERE ARE NO OTHER EXPRESS OR IMPLIED WARRANTIES AND NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR OF NONINFRINGEMENT OF THIRD PARTY RIGHTS (INCLUDING, BUT NOT LIMITED TO, COPYRIGHT AND PATENT RIGHTS). LIMITATION OF LIABILITY: IT IS UNDERSTOOD AND AGREED THAT DOLBY LABORATORIES LIABILITY, WHETHER IN CONTRACT, IN TORT, UNDER ANY WARRANTY, IN NEGLIGENCE, OR OTHERWISE, SHALL NOT EXCEED THE COST OF REPAIR OR REPLACEMENT OF THE DEFECTIVE COMPONENTS OR ACCUSED INFRINGING DEVICES, AND UNDER NO CIRCUMSTANCES SHALL DOLBY LABORATORIES BE LIABLE FOR INCIDENTAL, SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, DAMAGE TO SOFTWARE OR RECORDED AUDIO OR VISUAL MATERIAL), COST OF DEFENSE, OR LOSS OF USE, REVENUE, OR PROFIT, EVEN IF DOLBY LABORATORIES OR ITS AGENTS HAVE BEEN ADVISED, ORALLY OR IN WRITING, OF THE POSSIBILITY OF SUCH DAMAGES. Dolby, Lake, and the double D symbol are registered trademarks of Dolby Laboratories. Part Number Contour, Ideal Graphic EQ, Iso Float, LimiterMax, Mesa EQ, Mesa Quad EQ, and Issue 5 Raised Cosine Equalization are trademarks of Dolby Laboratories. S08/19119/20435 All other trademarks remain the property of their respective owners Dolby Laboratories. All rights reserved. Dolby Lake Processor System Manual ii

3 Regulatory Notices Regulatory Notices FCC NOTE: 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. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with this instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Canada This Class A digital apparatus complies with Canadian ICES 003. EU/EMC This equipment complies with the EMC requirements of EN and EN when operated in an E2 environment in accordance with this manual. WEEE PRODUCT END OF LIFE INFORMATION This product has been designed and built by Dolby Laboratories to give many years of service, and is backed by our commitment to provide high quality support. When it eventually reaches the end of its serviceable life, it should be disposed of in accordance with local or national legislation. For current information please visit our web site: Important Safety Instructions 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. 7. Clean only with dry cloth. 8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Dolby Lake Processor System Manual iii

4 9. No naked flame sources, such as lighted candles, should be placed on the apparatus. 10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. 11. Only use attachments/accessories specified by the manufacturer. 12. Unplug this apparatus when unused for long periods of time. 13. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as the power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. 14. Do not expose the apparatus to dripping or splashing and no objects filled with liquids, such as vases, shall be placed on the apparatus. 15. CAUTION: Troubleshooting must be performed by a trained technician. To reduce the risk of electric shock, do not attempt to service this equipment unless you are qualified to do so. 16. 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. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 17. This apparatus must be earthed (grounded) by connecting to a correctly wired and earthed power outlet. 18. Ensure that your mains supply is in the correct range for the input power requirement of the unit. 19. In order to reduce the risk of electrical shock, the power cord must be disconnected when the power supply assembly is removed. 20. This equipment is designed to mount in a suitably ventilated 19 rack. Ensure that any ventilation slots in the unit are not blocked or covered. 21. To avoid exposure to dangerous voltages and to avoid damage to the unit, do not connect any Ethernet ports to telephone circuits. 22. The power cord with CEE7/7 plug which may be supplied with this unit for use in Continental Europe must be connected to a polarised mains socket, or the socket must be supplied via a residual current breaker (RCD). This power cord is not suitable for use in the UK. To use the cord in the UK cut off the CEE7/7 plug and replace with an approved BS A plug: The green and yellow core must be connected to the terminal in the plug identified by the letter E, or by the earth symbol, or coloured green, or green and yellow. The blue core must be connected to the terminal marked with the letter N or coloured black. The brown core must be connected to the terminal marked with the letter L or coloured red. Fuses WARNING: Check that the correct fuses have been installed. For continued protection against risk of fire, replace only with fuses of the same type and rating: T 1.5A L (time lag, 1.5 A, 20 mm, low breaking capacity, 250 V) iv Dolby Lake Processor System Manual

5 Table of Contents Regulatory Notices... iii List of Figures... vii List of Tables... viii Introduction Manual Overview Product Specifications... 3 Configurations Basic Configurations Configuration Naming Conventions Dolby Lake Processor LPD Dolby Lake Processor LP4D Dolby Lake Processor LP8D Dolby Lake Processor LP4D Dolby Lake Processor LP4D Signal Processing Configurations Loudspeaker Processor Configuration (CONTOUR) System Equalizer Configuration (Mesa EQ) Loudspeaker and Equalizer Configuration (Contour/MesaEQ) Front-Panel Interface Front-Panel Connectivity and Power Ambient Light Sensor Ethernet Port Ethernet Activity Indicators Infrared Transceivers Standby Power Button Global Function Buttons Mute Enable Meter View Menu Mode Portal Meter Display Meter Modes Menu Mode Main Menu Main Menu Edit Menu Main Menu Edit Menu Parametric EQ Edit Main Menu Edit Menu GEQ Edit Main Menu Edit Menu Levels Main Menu Presets Menu Main Menu Utility Menu Dolby Lake Processor System Manual v

6 Contents Main Menu Utility Menu Reset Processor Menu Main Menu Utility Menu Reset Processor Menu Reset Confirmation Menus Processor Reset Confirmation Display Main Menu Utility Menu Technical Information Menu Main Menu Utility Menu Reset Networking Main Menu Front-Panel Configuration Menu Main Menu Front-Panel Configuration Menu Access Control Menu Main Menu Front-Panel Configuration Menu Access Control Menu Password Entry Keyboard Lake Contour and Mesa Quad EQ Front-Panel Reference Lake Contour Front-Panel Functions Mesa Quad EQ Front-Panel Functions Back-Panel Interface Back-Panel Overview Base Platform Power Inlet AES/EBU I/O MP I/O Word Clock Memory Slot Ethernet Communication and Dante Audio S/PDIF I/O Analog Cards Analog Input Card Analog Output Card Iso-Float Ground Isolation System CobraNet Card System Interconnection Example Networking Dolby Lake Processor Networking Features Cable Specification Connecting Multiple Processors on Wired Ethernet Networks Wireless Network Operation Networking with Lake Contour and Mesa Quad EQ Processors Connecting Digital Audio Devices Internal and External Clocks Clock Source Priorities Cascading AES and Word Clock Input Signals Signal Processing Latency Index vi Dolby Lake Processor System Manual

7 List of Figures List of Figures Figure 2-1 Dolby Lake Processor LPD Configuration... 5 Figure 2-2 Dolby Lake Processor LP4D4 Configuration... 6 Figure 2-3 Dolby Lake Processor LP8D8 Configuration... 6 Figure 2-4 Dolby Lake Processor LP4D8 Configuration... 6 Figure 2-5 Dolby Lake Processor LP4D12 Configuration... 7 Figure Loudspeaker Processor Configuration Figure System Equalizer Configuration Figure 3-3 Loudspeaker Processor/System Equalizer Configuration Figure 4-1 Front-Panel Connector and Power Button Figure 4-2 Front-Panel Global Function Buttons Figure 4-3 Dolby Lake Processor Front Panel Figure 4-4 Portal Display and Functionality Figure 4-5 Level Metering in Action Figure 4-6 Output Metering Mode (Default) Figure 4-7 Physical Input Meters Figure 4-8 Module Input Meters Figure 4-9 Portal Reference Numbers Figure 4-10 Main Menu Figure 4-11 Edit Menu Figure 4-12 Parametric EQ Edit Menu Figure 4-13 Parametric EQ Edit Portal Figure 4-14 Parametric EQ Edit Portals 3 and Figure 4-15 Parametric EQ Edit Menu for Mesa Filter Figure 4-16 Graphic EQ Edit Menu Figure 4-17 Graphic EQ Edit Overlay Insert/Bypass Figure 4-18 Overlay Insert/Bypass Portal Figure 4-19 EQ GEQ Gain Edit Portal Figure 4-20 Levels Edit Figure 4-21 Presets Menu Figure 4-22 Utility Menu Figure 4-23 Reset Processor Menu Figure 4-24 Partial Reset Confirmation Menu Figure 4-25 Factory Reset Confirmation Menu Figure 4-26 Processor Reset Confirmation Display Figure 4-27 Technical Information Menu Figure 4-28 Front-Panel Configuration Menu Figure 4-29 Access Control Menu Figure 4-30 EQ Limits Portal Figure 4-31 Front-Panel Password Entry Keyboard Figure 5-1 Dolby Lake Processor Back Panel Figure 5-2 Base Platform Figure 5-3 AES/EBU Pinout Figure 5-4 Input Card Figure 5-5 Output Card Figure 5-6 Iso-Float Control on Analog Converter Cards Dolby Lake Processor System Manual vii

8 Contents Figure 5-7 CobraNet Card Figure 5-8 Typical Sound System Application Figure 5-9 Wireless Connectivity with Tablet PC Figure 6-1 Simple Wired Network Connection Figure 6-2 Complex Wired Network Connection Figure 6-3 Example Wireless Network Configuration Figure 6-4 Mixed-Mode Network Connection Figure 7-1 Dolby Lake Processor Clock System Figure 7-2 Primary Clock [Auto] Clock Logic Figure 7-3 Connectors and Termination Lift Switch Figure 7-4 Termination Lift Switch Figure 7-5 Cascading Word Clock Connection Figure 7-6 Dolby Lake Processor Latencies List of Tables Table 4-1 Lake Contour Front-Panel Functions Table 4-2 Mesa Quad EQ Front-Panel Functions Table 5-1 AES/EBU Pin List Table 5-2 Iso-Float Status LED Table 6-1 Common Ethernet Cable Categories Table 7-1 Common Input-Output Latencies viii Dolby Lake Processor System Manual

9 Chapter 1 Introduction The Dolby Lake Processor marks the next generation in digital loudspeaker and equalization technology. With unsurpassed audio quality and the most advanced loudspeaker processing available, it will improve the sound of any system. Effortless control is provided through the Dolby Lake Controller software, or the exclusive front panel Portal metering and control interface. The Processor platform offers complete, native digital signal processing functionality, with support for up to 4 in, 12 out loudspeaker applications and 8 in, 8 out EQ applications. The signal processing can also be changed to provide an EQ 4 4 configuration together with a loudspeaker 2 6 configuration. The Processor includes several advanced technologies for improving sound quality. These include Raised Cosine Equalization TM (the foundation underlying the Ideal Graphic EQ TM and Lake Mesa EQ TM interfaces), plus linear phase crossovers, LimiterMax TM loudspeaker protection, and Iso Float TM ground isolation. 1.1 Manual Overview This manual provides detailed reference information for the Dolby Lake Processor system hardware. The manual is organized as follows: Chapter 1, Introduction (this chapter). Chapter 2, Configurations, describes the various hardware configurations that are supported by the Processor. Chapter 3, Signal Processing Configurations, presents the three different signal processing configurations that provide loudspeaker processing and system equalizer processing. Chapter 4, Front Panel Interface, presents the front panel Portal metering and control interface. Chapter 5, Back Panel Interface, describes all of the connections and controls provided on the back panel of the Processor. Chapter 6, Networking, explains the networking capabilities of the Processor, and illustrates common networking connections. Dolby Lake Processor System Manual 1

10 Introduction Chapter 7, Connecting Digital Audio Devices, explains how to interface the Processor with other digital audio devices, as well as the various latencies incurred when connecting analog, synchronous digital, and asynchronous digital devices. The Processor is complemented by the Dolby Lake Controller software interface. For more information on the Controller software, please refer to the Dolby Lake Controller Manual. 2 Dolby Lake Processor System Manual

11 Product Specifications 1.2 Product Specifications Audio Performance Conversion Resolution 24-bit Internal Sample Rate 96 khz Internal Data Path 32-bit floating point System Propagation Delay <2 ms from any input to any output (analog or digital) Maximum Available Delay 2 s from any input to any output Sample-Rate Converters Operating Sample Rates 44.1, 48, 88.1, 96 khz Resolution 24-bit THD + Noise % typical, 20 Hz to 20 khz, unweighted Dynamic Range 140 db typical, 20 Hz to 20 khz, unweighted Back-Panel Interface Analog I/O Connectors XLR AES/EBU I/O Connectors 25-pin D-connector, with selectable termination on pairs 1 and 2 S/PDIF I/O Connectors Toslink optical Word Clock Input BNC with selectable termination Ethernet Auto 10/100, Auto Uplink: (2) RJ-45, (1) EtherCon Power 3-pin IEC, 2 fuses T 1.5A L, 5 20 mm Digital-to-Analog Outputs Frequency Response +0/ 0.1 db, 3 Hz to 20 khz THD + Noise % typical at 1 khz % typical, 20 Hz to 20 khz, unweighted Dynamic Range 113 db typical, 20 Hz to 20 khz, unweighted Output Impedance 50Ω Maximum Output Level +21 dbu Crosstalk 100 db, 2 Hz to 40 khz Analog to Digital Inputs Frequency Response +0/ 0.2 db, 2 Hz to 20 khz THD + Noise % typical at 1 khz, % typical, 20 Hz to 20 khz, unweighted at +21 dbu headroom setting Dynamic Range 116 db typical, 20 Hz to 20 khz, unweighted at +21 dbu headroom setting Input Impedance 20 kω balanced, 10 kω unbalanced Maximum Input Level +26 dbu Input Sensitivity Settings for Digital Full-Scale +10, +16, +21, +26 dbu Common Mode Rejection 65 db, 20 Hz to 20 khz, 75 db typical at 1 khz, 70 db typical at 20 khz Crosstalk 100 db, 2 Hz to 40 khz Combined A/D and D/A THD + Noise % typical at 1 khz, % typical, 20 Hz to 20 khz, unweighted Dynamic Range 113 db typical, 20 Hz to 20 khz, unweighted AES/EBU I/O and S/PDIF I/O Supported Resolutions Up to 24 bits Supported Sample Rates 44.1, 48, 88.1, 96 khz Dante Supported Resolution 24 bits Supported Sample Rate 96 khz Number of I/O channels 8 input and 16 output channels Power Requirements VAC ±10%, 120 W maximum Dimensions and Weight 2-RU rackmount: cm ( inches); net: 9 kg (20 lb) Dolby Lake Processor System Manual 3

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13 Chapter 2 Configurations The Dolby Lake Processor provides native digital processing with AES/EBU, S/PDIF, and Dante inputs and outputs. Analog and CobraNet TM I/O is possible through interchangeable cards. This chapter provides an overview of each hardware configuration supported by the Processor. 2.1 Basic Configurations There are five basic Dolby Lake Processor configurations; each has a unique model number to distinguish it Configuration Naming Conventions At the beginning of the name is the acronym LP for Lake Processor. The letters and numbers following LP define the input and output configuration. LPD stands for Lake Processor Digital, where Digital represents both inputs and outputs. Because the Processor has AES/EBU, S/PDIF, and Dante digital I/O native to the platform, the base acronym is LPD. As an example, the model number LP4D8 represents the configuration: Lake Processor, four analog inputs, digital I/O, and eight analog outputs. The letter D separates inputs from outputs Dolby Lake Processor LPD Figure 2-1 Dolby Lake Processor LPD Configuration The LPD provides the foundation of the Dolby Lake processing system. With native digital I/O in AES/EBU, S/PDIF, and Dante formats, the LPD provides an ideal solution for all digital live sound systems, digital console channel inserts, and digital studio processing. Four card slots are provided for upgrading to incorporate analog converter cards or a CobraNet card. Dolby Lake Processor System Manual 5

14 Configurations Dolby Lake Processor LP4D4 Figure 2-2 Dolby Lake Processor LP4D4 Configuration Two analog converter cards added to provide four analog inputs and four analog outputs for EQ purposed signal processing Dolby Lake Processor LP8D8 Figure 2-3 Dolby Lake Processor LP8D8 Configuration The LP8D8 provides eight channels each of analog inputs and outputs Dolby Lake Processor LP4D8 Figure 2-4 Dolby Lake Processor LP4D8 Configuration The LP4D8 delivers loudspeaker processing in a four analog input, eight analog output configuration. 6 Dolby Lake Processor System Manual

15 Basic Configurations Dolby Lake Processor LP4D12 Figure 2-5 Dolby Lake Processor LP4D12 Configuration The LP4D12 provides 4 analog inputs and 12 analog outputs. Dolby Lake Processor System Manual 7

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17 Chapter 3 Signal Processing Configurations The Dolby Lake Processor provides three different signal processing configurations that allow for loudspeaker processing, system equalization, or a combination of both. This chapter presents the details of these three configurations. The signal processing configurations complement the possible hardware configurations but are not tied to them. You can choose to run a loudspeaker processor signal processing configuration or a system equalizer signal processing configuration regardless of the hardware configuration. The signal processing configuration can be changed through the Processor front panel, or through the Dolby Lake Controller software user interface. Please refer to Chapter 4 of this manual for details on how to change the signal processing configuration from the front panel. Please refer to the Dolby Lake Controller Manual for further details on changing the signal processing configuration from the Controller. Dolby Lake Processor System Manual 9

18 Signal Processing Configurations 3.1 Loudspeaker Processor Configuration (CONTOUR) The Dolby Lake Processor provides a 4 12 loudspeaker processor configuration, as shown in the simplified block diagram in Figure 3 1. Output EQ Levels Output EQ Levels Output EQ Levels Output EQ Levels Input 1 Gain EQ Delay Output EQ Levels Input 2 Input 3 Input Mixers Gain Gain EQ EQ Delay Delay Crossovers Output EQ Output EQ Levels Levels Output Routing Input 4 Gain EQ Delay Output EQ Levels Output EQ Levels Output EQ Levels Output EQ Levels Output EQ Levels Figure Loudspeaker Processor Configuration The diagram presents the underlying signal processing architecture of the loudspeaker processor configuration. Four channels of input processing are routed through crossovers to further EQ and levels processing before being sent through an output router that allows for any processed channel to be delivered to any physical output. The input mixer, crossover, and output router blocks are all configured through the Dolby Lake Controller software. Output channels are grouped within the software user interface to provide partitioned views of output channel processing. For example, the factory reset loudspeaker processor configuration provides four three way crossovers. If the Processor hardware is configured with analog outputs, an identical signal is delivered to both analog and digital outputs of the same channel number. For example, in the factory reset Dolby Lake Processor LP4D8, the same signal is present on analog output 1 as on digital output Dolby Lake Processor System Manual

19 Loudspeaker and Equalizer Configuration (Contour/MesaEQ) 3.2 System Equalizer Configuration (Mesa EQ) The Dolby Lake Processor provides an 8 8 system equalizer configuration, as shown in the simplified block diagram in Figure 3 2. Input 1 Gain EQ Delay HPF/ LPF Output Levels Input 2 Gain EQ Delay HPF/ LPF Output Levels Input 3 Gain EQ Delay HPF/ LPF Output Levels Input 4 Input 5 Input Mixers Gain Gain EQ EQ Delay Delay HPF/ LPF HPF/ LPF Output Levels Output Levels Output Routing Input 6 Gain EQ Delay HPF/ LPF Output Levels Input 7 Gain EQ Delay HPF/ LPF Output Levels Input 8 Gain EQ Delay HPF/ LPF Output Levels Figure System Equalizer Configuration The system equalizer configuration provides eight independent channels of processing. Each channel of processing can derive its input signal from any combination of the eight input signals, and each output can be delivered to any physical output. As with the loudspeaker processor configuration, an identical signal is delivered to both analog and digital outputs of the same channel number. Dolby Lake Processor System Manual 11

20 Signal Processing Configurations 3.3 Loudspeaker and Equalizer Configuration (Contour/MesaEQ) The Dolby Lake Processor provides a third configuration, which is a combination of loudspeaker processor and system equalizer configurations. This split mode configuration provides a 2 6 loudspeaker processor and a 4 4 system equalizer configuration, as shown in the simplified block diagram in Figure 3 3. Figure 3-3 Loudspeaker Processor/System Equalizer Configuration In this configuration, as with both the loudspeaker processor and system equalizer configurations, any channel of processing can be sent to any physical output, as signified by the single output router component of the block diagram. 12 Dolby Lake Processor System Manual

21 Chapter 4 Front-Panel Interface The Dolby Lake Processor provides exclusive front panel metering and control through our Portal interface. Each of the four front panel Portals can represent multiple channels of level and limiter metering. Portals also provide user configurable text labels and mute controls. The front panel also includes Ethernet connectivity, and global function buttons that provide input muting, metering, and menu navigation control. This chapter details the functionality provided by the Processor front panel. 4.1 Front-Panel Connectivity and Power The right side of the Dolby Lake Processor front panel provides a variety of connectivity options. Figure 4 1 identifies each feature. Ambient Light Sensor Ethernet Port Ethernet Activity Indicators Infrared Transceivers Standby Power Figure 4-1 Front-Panel Connector and Power Button Ambient Light Sensor Not currently in use Ethernet Port A standard RJ45 Ethernet connector is provided on the front panel for ease of access to the network. The connection features auto 10/100 and auto uplink functions to make networking fast and easy. Auto 10/100 allows you to connect the Dolby Lake Processor to either 10Base T or 100Base T Ethernet networks without having to consider this issue. Auto uplink allows Dolby Lake Processor System Manual 13

22 Front-Panel Interface you to connect any Ethernet cable, whether it is wired internally as a crossover or straightthrough cable. The front panel Ethernet connection is intended for temporary connections of Dolby Lake Controller computers. Please use the Ethernet connections located on the back panel for permanent wiring in racks or into existing network infrastructure in installations Ethernet Activity Indicators Activity indicators located next to the Ethernet port provide both link and activity status Infrared Transceivers Not currently in use Standby Power Button The standby power button will turn audio processing off, and engage a Low Power mode. The standby power button must be held down for a minimum of one second to turn the Processor on or off. The primary power switch is located on the back panel, as part of the power inlet connection. 14 Dolby Lake Processor System Manual

23 Global Function Buttons 4.2 Global Function Buttons The left side of the Dolby Lake Processor front panel provides three global function buttons. Figure 4 2 identifies each function. Mute Enable Meter View Menu Mode Figure 4-2 Front-Panel Global Function Buttons Mute Enable Used in tandem with the Portal displays, the Mute Enable button enables the ability to mute input channels, module inputs, and output channels. The Mute Enable button must be depressed to engage muting, and the button flashes to indicate that muting has been enabled. If Mute Enable mode is not disengaged manually, it will automatically disable after two minutes. Holding the Mute Enable button for two seconds will lock Mute Enable mode until the button is manually pressed again Meter View The Meter button toggles through multiple meter views on the Portal displays. By default, each Portal shows output channel metering. By pressing the Meter button, you can toggle to view physical input meters and module input meters Menu Mode The Menu button provides access to front panel control of the Dolby Lake Processor, utilizing a menu driven interface that allows you to navigate through available functionality via the Portal displays. Menu mode provides a familiar interface, as it follows the same logic as the button bar menu interface found in the Dolby Lake Controller software. Portal metering and control are detailed later in this chapter. Dolby Lake Processor System Manual 15

24 Front-Panel Interface 4.3 Portal Meter Display The Portal provides a revolutionary metering display that allows for multiple channels of metering on a single circular display. The Dolby Lake Processor provides four Portals on the front panel, as shown in Figure 4 3. Figure 4-3 Dolby Lake Processor Front Panel Figure 4 3 shows a variety of Portal output channel meter views, including four way, twoway, and three way crossover modules, and a three auxiliary output module. As this figure illustrates, each Portal represents all audio channels that are part of a given processing module. Each custom LCD Portal display provides three ten character user configurable text displays, two 104 segment rings, 16 mute and soft function buttons, arrow keys, and one ME button for Portal control and parameter adjustment. Figure 4 4 highlights Portal display and functionality in the default meter view of output metering for a Lake Contour TM module. Channel Name Parameter Adjustment Multifunction Selection and Communication Channel Identification and Muting Level Metering Limiter Metering Module Name Figure 4-4 Portal Display and Functionality 16 Dolby Lake Processor System Manual

25 Portal Meter Display Channel Labels Each channel represented by the Portal has a user defined channel label, displayed on either the upper or lower text display depending on the physical location of the meter display. Channel labels can be configured using the Dolby Lake Controller software. Channel Identification and Muting The Portal is surrounded by a circle of buttons that provide multiple soft functions. In the default output channel meter view, these buttons identify the physical location and mute status of each output channel. When the Mute Enable button is engaged, these buttons are also used to mute/unmute output channels. Level Metering The inner ring of metering segments is divided into multiple level meters. In the example shown in Figure 4 4, three output level meters are shown on the Portal. The Portal displays level metering as an envelope function emanating from the center point of the channel meter. As level increases and decreases, the meter expands in both directions and then contracts as shown in Figure 4 5. Figure 4-5 Level Metering in Action The same envelope function is used in the other Portal views to display physical input and module input metering. Limiter Metering The outer ring of metering segments is divided into multiple limiter meters. Similar to level metering, the Portal displays limiter metering as an envelope function emanating from the center point of the channel limiter. As limiting increases, the meter expands in both directions. Module Label For loudspeaker processor modules, the module label is shown in the Portal s middle text display. In Mesa EQ TM mode, each Portal shows two module labels on the top and bottom text displays. The module label can be configured using the Controller software. Dolby Lake Processor System Manual 17