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The Midas Pro Series has become established as the industry standard on live concert tours and the road-proven DL371Pro3 audio system engine has provided the superior audio processing heard at many of the most prestigious live events held worldwide. The DL371Pro3 features managed latency and 40 bit floating point processing precision. DL371Pro3 sets the standard of performance in high-profile live sound applications and is a truly impressive audio system engine for the engineer whose very livelihood depends on both unparalleled functionality and reliability. DL371Pro3’s powerful DSPs and high-performance FPGA (Field-Programmable Gate Array) technology, coupled with a highly efficient MIMD (Multiple Instruction, Multiple Data) architecture, delivers 21.1 Gigaflops of real-time audio processing. With the capability to handle up to 56 simultaneous input channels and 27 time-aligned and phase-coherent output mix buses, DL371Pro3 is a powerhouse of digital audio mixing technology. HyperMAC and AES50 audio networking technologies allow up to 288 inputs and 294 outputs at 96 kHz sampling frequency combined with 40 bit floating point processing precision, which can be dynamically assigned to the Pro3’s input channels and bus outputs on a dynamic scene-by-scene basis. This high level of connectivity, coupled with the large channel and bus counts, make the Pro3 and DL371Pro3 equally at home in theatres and symphony halls as it is in live concert touring, outside broadcast and music festivals.
Digital Audio NetworkingSuperMAC (AES50-Compliant) and HyperMAC digital audio networking technologies from Klark Teknik simultaneously provide high channel countsultra low and deterministic latencies sample-synchronous and phase-aligned networked clock distributionerror detectionnetwork redundancyand ease of deployment and use – to meet the demanding requirements of live concert touring.
The DL371Pro3 HyperMAC router provides a dual redundant snake connection to the Pro3 Control Centre over optical fibre and copper with a bandwidth of 192 bidirectional channels of 96 kHz 24 bit digital audioup to a distance of 500 m with optical fibre or 100 m with CAT5/5e cable.
DL371Pro3 is compatible with all Midas Pro Series digital I/O unitsas well as with any other 96 kHz-enabled AES50-equipped devices. Multiple Pro Series consoles can be connected together to create either larger mixing systemsor multiple discrete mixing consoles can share a common resource of networked and distributed I/O interfaces.
40 Bit Floating Point ProcessingDL371Pro3 can simultaneously process up to 6 internal multi-channel eff ects and its 40 bit floating-point audio processing hosts a wide choice of virtual effects devices, which range from dual-mono delay units, stereo modulation and numerous diverse reverberation simulations, multi-band compression, dynamic EQ and multi-channel dual-function dynamics processing. Up to 28 1?3 octave Klark Teknik DN370 Graphic Equalisers (GEQs) are provided, which can be patched into any output.
The oversampled digital signal processing algorithms, combined with the fully interpolated and touch sensitive user controls, result in the smooth continuous response and immediacy of working on an analogue console. Parameter adjustment becomes fast and easy, and the continuous phase shift of a swept frequency control is heard without the quantisation artefacts exhibited by competing digital consoles.
DL371Pro3 provides comprehensive automatic latency management of all internal routing and processing delays – and also includes compensation for external analogue inserts. All audio samples are synchronised before summing, resulting in absolute phase coherence at the outputs, without the comb filtering effects of competing products that often result in specific frequencies being cancelled out completely.
All effects processors and GEQs are custom-designed to function within this automatic latency compensation system. This ensures a phase-coherent, sample-accurate mix regardless of whether the devices are used as channel inserts or on auxiliary buses.
Expandable DSP ProcessingDL371Pro3 is fitted with 4 DL371A DSP cards as standard. Additional DL371A DSP cards allow upgrades to Pro6 and Pro9 and N+1 redundant operation. In the very rare event that one of the DSP cards should experience an execution fault, the optional redundant card is loaded with that card’s profile under the control of the Pro 3 Control Centre.
Built for the RoadFeaturing a rugged steel 7U rackmount enclosure, DL371Pro3 is designed for the rigours of live concert touring. Premium Neutrik connectors are used to ensure reliable network connections, night after night.
Redundancy - For Peace of MindDL371Pro3 features three removablepower supplies - only two of which are required for operation. The power supplies, which are interchangeable with those in the Pro3 Control Centre, are autovoltage sensing for use on a worldwide basis and provide seamless switchover in the unlikely event of a loss of one of the three power supplies.
Combined with the dual-redundant HyperMAC snake and the redundant AES50 networking, plus the N+1 redundancy offered by the optional additional DSP card, no other console system goes further in providing peace of mind. This means that during a show the user can focus on what is most important - treating the audience to a fl awless sonic experience.
Architecture and Engineering SpecificationsThe audio system engine shall be designed for digital audio mixing applications and be optimised for use in live performance. It shall feature 88 simultaneous input channels and 35 time-aligned and phase-coherent output mix buses and operate at 96 kHz sampling rate.
The audio system engine shall include Gigabit and 100 Mbit/s Ethernet frame-based digital audio networking with a total network channel count capability of 288 inputs and 294 outputs at 96 kHz sampling rate. A Gigabit Ethernet frame-based digital audio network router shall be included with 192 bidirectional channels operating over optical fibre up to 500 m and CAT5/5E cable up to 100 mand provide a dual redundant digital snake connection to the associated control centre.
The Gigabit digital audio network shall operate on a time-division multiplex basisand shall provide accurate phase-aligned low-jitter clock distribution using embedded timing markers in the data streams to allow transmission over either Cat5/5E copper cable up to a distance of 100 m as specified by the IEEE 802.3 Ethernet standardor up to distances of 500 m using 50/125 ?m multimode optical fibre. It shall provide two levels of cyclic redundancy check (CRC) error detection - a checksum sent with theassociated Ethernet frame and an additional checksum for audio data. A dedicated 200 Mbit/s auxiliary data channel shall be provided for control data.
The Gigabit digital audio network shall have an individual link latency of 62.5 ?s at 96 kHz sampling rate and support dual redundant operation.
The 100 Megabit Ethernet frame-based digital audio network shall offer N+1 cable redundancy and be compliant with the Audio Engineering Society AES50-2011 standard.
In conjunction with the associated digital console control centrethe audio system engine shall provide up to 36 assignable digital audio emulations of industry standard one-third octave proportional-Q response graphic equalisers and up to 8 simultaneous multi-channel digital audio effects. There shall be automatic latency management of all internal routingexternal analogue insert and digital signal processing delays. This latency management system shall synchronise audio samples when summing to mix buses to