DL461 and DL471 Architects and Engineering Specification

The system shall include the ability to site its components at multiple locations with multi-channel digital signal interconnections providing all audio routing between them.

The system shall incorporate two dual redundant digital routers at either end of a 192 channel bi-directional digital audio cable systems that can run up to 100 meters on CAT-5E cable or 500 meters on fibre optic cable.

For local distribution the system shall use multiple CAT-5E cables to carry 24 channels of AES50 protocol digital audio bi-directionally over cable up to 100 meters long.

The main router units shall form a 240 channel bi-directional routing matrix to and from, the processing units, the 192 channel long haul digital audio connection, and 10 other AES50 ports, that provide up to 240 channels of external connectivity.

The processing units shall be formed as modular 1U 19" rack boxes with universal mains power supplies and connected to both each other and the main dual redundant audio router systems, housed in 3U 19" rack boxes also with universal mains power supplies. The control surface shall be connected to, and physically contain, another set of dual redundant routers.

The processor units shall be operated in N+1 mode with a hot spare always available and with a ring topology interconnection system such that the system can operate at full capacity with either a missing connection or inactive processor unit. Audio data interconnections shall be made with both routers within the redundant pair to ensure fault tolerance.

The routers shall meet or exceed the following specifications:

 

Digital Audio Protocol (dual redundant)	AES50
Input/Output & Split Unit Control Protocol	Embedded in AES50
Sample Rate	96kHz
Word Length	24 bit
Processor Control Protocol	Ethernet
Long Haul "snake"	HyperMac Fibre or CAT-5E
Sync	AES3 in & out plus 75R word clock in & out
External Data Transition Tunnel	2 x Ethernet
Dimensions	3U x 410mm Weight 11.5kg
The processors shall meet or exceed the following specifications:
Digital Audio Protocol (dual redundant)	AES50
Sample Rate	96kHz
External Word Length	24 bit
Internal Maths Word Length	32 bit floating point
Processor Control Protocol	Ethernet
Dimensions	1U x 410mm Weight 6.7kg
The available audio processing shall include:
Input Channel Functions:
Input Channel Hi Pass	10Hz to 400Hz swept slope selectable 12dB/Oct or 24dB/Oct
Input Channel Lo Pass	2kHz to 20kHz swept slope selectable 6dB/Oct or 12dB/Oct
Input Channel Treble	Parametric Operation Frequency 1kHz to 25kHz swept Gain +16dB to –16dB BW 0.1 Oct to 3 Oct
	Shelf Operation Frequency 1kHz to 25kHz swept Gain +16dB to –16dB Soft, Classic or Bright (minimum harmonic disruption) curves
Input Channel Hi Mid	Parametric Operation Frequency 320Hz to 8kHz swept Gain +16dB to –16dB BW 0.1 Oct to 3 Oct
Input Channel Lo Mid	Parametric Operation Frequency 80Hz to 2kHz swept Gain +16dB to –16dB BW 0.1 Oct to 3 Oct
Input Channel Bass	Parametric Operation Frequency 16Hz to 400Hz swept Gain +16dB to –16dB BW 0.1 Oct to 3 Oct
	Shelf Operation Frequency 16Hz to 400Hz swept Gain +16dB to –16dB Warm, Classic or Deep (minimum harmonic disruption) curves
Input Channel Compressor	Peak, Linear, RMS, Vintage modes Thresh -50dBu to +20dBu Attack 200uS to 20mS Release 50mS to 3 Sec Ratio 25:1 to 1:1 Knee 4dB, 12dB or 40dB Gain 0dB to +24dB
	Side chain source selectable + filter Frequency 50Hz to 15kHz swept Bandwidth 1/3, 1 or 2 Oct
Input Channel Gate	Peak mode Thresh -50dBu to +20dBu Attack 10uS to 20mS Hold 5mS to 2 Sec Release 2mS to 2 Sec Range 100dB to 0dB
	Side chain source selectable + filter Frequency 50Hz to 15kHz swept Bandwidth 1/3, 1 or 2 Oct
Output Channel Functions:
Output Channel Band 6	Parametric Operation Frequency 16Hz to 25kHz swept Gain +16dB to –16dB BW 0.1 Oct to 3 Oct
	Lo Pass Operation Frequency 16Hz to 25kHz swept Slope 6dB/Oct or 12dB/Oct
	Shelf Operation Frequency 16Hz to 25kHz swept Gain +16dB to –16dB Mode soft curve
Output Channel bands 3,4,5	Parametric Operation Frequency 16Hz to 25kHz swept Gain +16dB to –16dB BW 0.1 Oct to 3 Oct
Output Channel Band 2	Parametric Operation Frequency 16Hz to 25kHz swept Gain +16dB to –16dB BW 0.1 Oct to 3 Oct
	Hi Pass Operation Frequency 16Hz to 25kHz swept Slope 24dB/Oct
Output Channel Band 1	Parametric Operation Frequency 16Hz to 25kHz swept Gain +16dB to –16dB. BW 0.1 Oct to 3 Oct
	Hi Pass Operation. Frequency 16Hz to 25kHz swept Slope 6dB/Oct or 12dB/Oct.
	Shelf Operation Frequency 16Hz to 25kHz swept Gain +16dB to –16dB Mode soft curve
Output Channel GEQ	16 available in place of PEQ (above) 31 Bands. 1/3 Oct. Proportional Q Lo Pass Frequency 2kHz to 20kHz swept Slope 6dB/Oct or 12dB/Oct
	Hi Pass Frequency 20Hz to 500Hz swept Slope 6dB/Oct or 12dB/Oct
Output Channel Dynamic	Pk, Linear, RMS, Vintage, Shimmer modes Thresh -50dBu to +20dBu Attack 200uS to 20mS Release 50mS to 3 Sec Ratio 25:1 to 1:1 Knee 4dB, 12dB or 40dB Gain 0dB to +24dB Dry mix 0% to 100%
	Side chain source selectable + filter Frequency 50Hz to 15kHz swept Bandwidth 1/3, 1 or 2 Oct
	Output Clipper Thresh 0dBu to +24dBu
Effects Channel Functions:
Stereo Effects Channel	16 available configurable as Stereo or mono in, stereo out Modulated delay effects Complex delay, reverbs Advanced dynamics RTA and advanced measurements
Effects Channel Stereo GEQ	16 available in place of effects (above) 31 Bands. 1/3 Oct. Proportional Q Lo Pass Frequency 2kHz to 20kHz swept Slope 6dB/Oct or 12dB/Oct Hi Pass Frequency 20Hz to 500Hz swept Slope 6dB/Oct or 12dB/Oct