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Dolby

®

Lake

®

Processor System Manual

9

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.

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Содержание Lake LP4D12

Страница 1: ...Dolby Lake Processor System Manual Issue 3 Part Number 911001 Dolby Lake Processor System Manual Issue 3 Part Number 911001...

Страница 2: ...D 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...

Страница 3: ...rtions of the power supply assembly are electrically hot To reduce risk of electric shock the power cord must be disconnected when the power supply assembly is removed The ground terminal of the power...

Страница 4: ...Vert Jaune WICHTIGER SICHERHEITSHINWEIS Dieses Ger t entspricht der Sicherheitsnorm EN60065 Das Ger t darf nicht mit Fl ssigkeiten Spritzwasser usw in Ber hrung kommen stellen Sie keine Gef e z B Kaf...

Страница 5: ...era att sp nningsv ljaren r inst lld p korrekt n tsp nning o Kontrollera att s kringarna r av r tt typ och f r r tt str mstyrka s som anvisningarna p enheten f reskriver o Enheten m ste vara jordad ge...

Страница 6: ...Virtual Dolby Technologies Test DVD Track List iv...

Страница 7: ...by Lake Processor LP4D8 7 2 2 6 Dolby Lake Processor LP4D12 7 2 3 Supported Configurations 7 Chapter 3 Signal Processing Configurations 9 3 1 Loudspeaker Processor Configuration 10 3 2 System Equalize...

Страница 8: ...ont Panel Configuration Menu Access Control Menu 29 4 5 14 Main Menu Front Panel Configuration Menu Access Control Menu Password Entry Keyboard 30 4 6 Lake Contour and Mesa Quad EQ Front Panel Referen...

Страница 9: ...6 4 Wireless Network Operation 45 6 5 Networking with Lake Contour and Mesa Quad EQ Processors 46 Chapter 7 Connecting Digital Audio Devices 47 7 1 Internal and External Clocks 47 7 2 Clock Source Pri...

Страница 10: ...Figure 4 9 Portal Reference Numbers 20 Figure 4 10 Main Menu 20 Figure 4 11 Edit Menu 20 Figure 4 12 Parametric EQ Edit Menu 21 Figure 4 13 PEQ Edit Portal 2 22 Figure 4 14 PEQ Edit Portals 3 and 4 2...

Страница 11: ...Network Connection 46 Figure 7 1 Dolby Lake Processor Clock System 48 Figure 7 2 Connectors and Termination Lift Switch 50 Figure 7 3 Termination Lift Switch 50 Figure 7 4 Cascading Word Clock Connect...

Страница 12: ...Virtual Dolby Technologies Test DVD Track List iv...

Страница 13: ...logies for improving sound quality These include Raised Cosine EqualizationTM the foundation underlying the revolutionary Ideal Graphic EQTM and Lake Mesa EQTM interfaces plus linear phase crossovers...

Страница 14: ...ing explains the networking capabilities of the Processor and illustrates common networking connections Chapter 7 Connecting Audio Devices explains how to interface the Processor to other digital audi...

Страница 15: ...l at 1 kHz 0 00056 typical 20 Hz to 20 kHz unweighted Dynamic Range 113 dB typical 20 Hz to 20 kHz unweighted Output Impedance 50 Maximum Output Level 21 dBu Crosstalk 100 dB 2 Hz to 40 kHz Analog to...

Страница 16: ...Virtual Dolby Technologies Test DVD Track List iv...

Страница 17: ...that will satisfy most system requirements Each has a unique code name to distinguish it 2 2 1 Configuration Naming Conventions At the beginning of the name is the acronym LP for Lake Processor The l...

Страница 18: ...log converter cards to provide four analog inputs and four analog outputs for EQ purposed signal processing the LP4D4 is the new generation Lake Mesa Quad EQTM Configured as the entry level analog and...

Страница 19: ...6 Dolby Lake Processor LP4D12 Figure 2 5 Dolby Lake Processor LP4D12 Configuration The LP4D12 takes the next step toward providing the ultimate loudspeaker system management tool Capable of running up...

Страница 20: ...ions 8 Table 2 1 Additional Dolby Lake Processor Configurations Code Name SKU Description LP4D 4 analog input digital I O LP8D 8 analog input digital I O LPD4 Digital I O 4 analog output LPD8 Digital...

Страница 21: ...e 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 sign...

Страница 22: ...ers 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 rou...

Страница 23: ...PF LPF HPF LPF HPF LPF HPF LPF HPF LPF HPF LPF Input 5 Input 6 Input 7 Input 8 Delay EQ Gain Delay EQ Gain Delay EQ Gain Delay EQ Gain Output Levels Output Levels Output Levels Output Levels Output Le...

Страница 24: ...s 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 Sy...

Страница 25: ...d 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 pro...

Страница 26: ...acks or into existing network infrastructure in installations 4 1 3 Ethernet Activity Indicators Activity indicators located next to the Ethernet port provide both link and activity status 4 1 4 Infra...

Страница 27: ...ck Mute Enable mode indefinitely 4 2 2 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 Mete...

Страница 28: ...uxiliary 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...

Страница 29: ...ure 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 decreas...

Страница 30: ...enu mode the up and down arrow buttons provide parameter adjustment along with the ability to scroll through function lists These arrow buttons are illuminated to indicate when they are active 4 4 Met...

Страница 31: ...ut view the meters show the post input mixer audio level for the input of each processing module In module input view pressing the Mute Enable button allows you to mute any module input by pressing th...

Страница 32: ...ss Edit Presets Utility or Front Panel Config menus by pressing the corresponding ME button Pressing the Menu button will exit Menu mode and return to Meter mode 4 5 2 Main Menu Edit Menu Figure 4 11...

Страница 33: ...option to view or edit the overlay is disabled If an overlay is set to view only then access is allowed although all edit controls are disabled Portal 4 is intentionally blank 4 5 3 Main Menu Edit Men...

Страница 34: ...width and frequency are independently adjustable An example of the PEQ Edit menu for a Mesa filter is shown in Figure 4 15 Figure 4 15 PEQ Edit Menu for Mesa Filter Use These Buttons to Set Selected P...

Страница 35: ...le in conjunction with channel selector or ME button to mute and unmute channels as per normal operation Portal 2 displays the selected frequency and the insert bypass status of the filter as describe...

Страница 36: ...ng modes and Mute Enable in conjunction with channel selector or ME button to mute and unmute channels as per normal operation Portal 2 displays the channel of the module that is selected for editing...

Страница 37: ...vant the value is displayed as N A and all buttons are inactive Where level controls have been locked by a system designer they display the word Locked 4 5 6 Main Menu Presets Menu Figure 4 21 Presets...

Страница 38: ...the processor as two Classic 3 Way Contour loudspeaker processor modules and four Mesa EQ modules Selecting Mesa EQ Reset performs a partial factory reset configuring the processor as eight Mesa EQ mo...

Страница 39: ...processor configuration is recalled Press the ME button on the left Portal to confirm performing a factory reset or press the ME button on the right Portal to cancel the reset procedure 4 5 10 Proces...

Страница 40: ...sor unit Use the ME button to activate deactivate text scrolling for values that are more than ten characters Portal 4 displays temperature degrees Celsius and fan information Use the up and down arro...

Страница 41: ...Control Menu Figure 4 29 Access Control Menu The Access Control menu provides options to set EQ limits and to lock out various front panel controls Use the arrows on Portal 1 to select the menu or fun...

Страница 42: ...ord Entry Keyboard Press a button associated with each character to enter the password The text will appear on the center line of Portal 1 Use the up arrow on any Portal to change between uppercase lo...

Страница 43: ...ur and Mesa Quad EQTM have a minimal front panel interface that allows you to recall presets mute input and output channels and perform other simple system functions The following tables provide a ref...

Страница 44: ...module scroll bar in the Modules menu locates the selected processor Display Current Firmware Version Press hold SEL then press hold A B together Firmware versions will scroll across the front panel o...

Страница 45: ...splay Current Firmware Version Press hold SEL then press hold input 1 and output 1 mute buttons together The ARM and DSP firmware versions will scroll across the front panel of the processor The text...

Страница 46: ...Virtual Dolby Technologies Test DVD Track List iv...

Страница 47: ...a detailed description of each connection on the back panel of the Processor 5 1 Back Panel Overview Figure 5 1 Dolby Lake Processor Back Panel The base platform provides a myriad of connections for i...

Страница 48: ...maximum power consumption of the Processor is 120 watts Two fuses T 1 5A L in a 5 20 mm package are also contained along with the power switch for the unit 5 2 2 AES EBU I O AES EBU inputs and output...

Страница 49: ...t switch so that you can remove the termination for cascading the same AES signal to other units When cascading AES signals ensure that the last device on the chain remains terminated 5 2 3 MP I O A h...

Страница 50: ...ftware release 5 2 6 Ethernet Three Ethernet connections are provided on two RJ45s and one EtherCon connector that provides a robust locking connection 5 2 7 S PDIF I O Optical ToslinkTM connectors pr...

Страница 51: ...r alternative to isolation transformers for avoiding ground loops in audio systems While isolation transformers are typically an expensive option for many processors Iso Float is standard on all conve...

Страница 52: ...loat switch is in the software control position Lift SC the Dolby Lake Controller can remotely control the ground state The LED indicates Iso Float operations as described in Table 5 2 Table 5 2 Iso F...

Страница 53: ...lby Lake Processor up to eight channels Two output bundles per Dolby Lake Processor up to 16 channels A redundant audio network provides a backup from the primary to secondary networks in the event of...

Страница 54: ...Ethernet access point will be used to provide a connection to a tablet PC operating the Dolby Lake Controller software Figure 5 9 Wireless Connectivity with Tablet PC Note The Processor must be rack...

Страница 55: ...in an XLR connector assembly for a robust locking connection If a system configuration requires a long point to point Ethernet cable run in an exposed location we recommend using the EtherCon port for...

Страница 56: ...ents of 100Base T networking 6 3 Connecting Multiple Processors on Wired Ethernet Networks Due to the auto sense and auto uplink features of the Ethernet ports connecting multiple units is a simple ta...

Страница 57: ...ss point simply works as a gateway between the wired network and wireless devices Figure 6 3 shows a complex wired network connected to a wireless tablet PC via a wireless access point Figure 6 3 Comp...

Страница 58: ...ork To ensure that a network bandwidth bottleneck does not occur connect the Lake Contour and Mesa Quad EQ processors through a Dolby Lake Processor In the scenario shown in Figure 6 4 the Processor s...

Страница 59: ...al latency incurred by sample rate converters is unacceptable in many live sound applications One millisecond is approximately equivalent to a sound propagation distance of one foot so a five millisec...

Страница 60: ...S7 AES8 INPUTS OUTPUTS AUTO MANUAL 48 AUTO MANUAL 44 c c c c c c c c c c c c c Figure 7 1 Dolby Lake Processor Clock System In Figure 7 1 each circled C represents a choice point A choice point is a u...

Страница 61: ...Rate Converter clocks are available to drive digital audio outputs The end user can independently choose the desired sample rate for each digital audio output as shown on the right side of Figure 7 1...

Страница 62: ...Lake Processor A termination lift switch is provided next to the corresponding input connectors Figure 7 2 Connectors and Termination Lift Switch Figure 7 3 Termination Lift Switch For AES connections...

Страница 63: ...rocessing Latency The Dolby Lake Processor provides a drastic reduction in latency as compared to other available solutions The latency through the Processor is always less than 1 5 ms regardless of t...

Страница 64: ...26 ms 0 260 ms 0 00 ms 0 159 ms AUDIO ROUTING AND SIGNAL PROCESSING 0 781 ms 24 bit 96 kHz D A 44 1 kHz 48 kHz 88 2 kHz 96 kHz 176 4 kHz 192 kHz 48 kHz 96 kHz 192 kHz 0 252 ms 0 241 ms 0 237 ms 0 241...

Страница 65: ...al Latency Analog 0 072 ms 0 781 ms Analog 0 252 ms 1 105 ms 48 kHz sync 0 26 ms 0 781 ms 48 kHz sync 0 24 ms 1 281 ms 96 kHz sync 0 ms 0 781 ms 96 kHz sync 0 ms 0 781 ms 192 kHz sync 0 159 ms 0 781 m...

Страница 66: ...Virtual Dolby Technologies Test DVD Track List iv...

Страница 67: ...rnet activity indicators 16 Ethernet connections 40 Ethernet connector 16 front panel ambient light sensor 16 connectivity and power 15 Ethernet activity indicators 16 Ethernet port 16 infrared transc...

Страница 68: ...0 presets menu 28 product specifications 3 reset processor menu 29 30 S PDIF I O 40 signal processing latency 57 specifications A D inputs 3 audio performance t 3 back panel interface 3 cable 48 combi...

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