Lake LM44 Audio Processor

Audio System Processor with Raised Cosine EQ and Simultaneous Cross-Platform Parameter Adjustments for Loudspeaker Management and System Control in High-Performance Applications

Product Features

Powerful, Compact and Fully Featured Standalone Digital Audio System Processing with Peerless Credentials: The LM 44 provides a four input/four output analog configuration that is suited for a variety of system signal processing and routing applications. The LM 44 also provides 8 × 8 AES3 digital I/O and 4 × 8 Dante networked I/O, all with comprehensive signal routing to provide Dante break-in / break-out and failover functionality. Two LM 44 units may be stacked and linked to function as an 8 × 8 processor.

LM 44 provides the ultimate combination of input/output signal flexibility and fail-safe operation. Audio inputs are accepted via the Dante network as well as on connectors for AES3 digital and analog. Simple programming in LAKE Controller allows multiple, user-configured automatic switching scenarios. For example, signals may be distributed over the Dante network, with an AES3 input source failing over to analog – and with the result automatically cascading to all Dante receivers. In addition, the LM Series’ dual-redundant network topology enables seamless switching in case of a problem on one Ethernet link.

LM 44 provides a total of eight input routers which can be independently configured with up to four input fail-over priority settings. And the output of any of these input routers can be patched directly to any analog, AES3 or Dante output – without using any of the valuable Module processing channels.

LAKE Processing

The advanced technology of LAKE Processing provides unparalleled power to shape and optimize sound in a variety of environments, regardless of loudspeaker system, the venue size or acoustics, or the program material.

Specification

• Features
• Module configuration: 2 Contour or 4 Mesa modules
• Channel processing: 6 in Contour mode, 4 in Mesa mode
• Input routers: 8 input routers with 4 priorities in each, seamless failover to lower priorities
• Module input mixer: 4 ch. for Contour, 8 ch. for Mesa-modules. Mix any ratio between all input routers.
• Input processing: Parameteric EQ with Mesa and Ideal Graphic equalizers, both utilizing Raised Cosine algorithms
• Output processing: Linear phase or Classic crossovers, Parametric EQ, shelving and all-pass filters
• Features: Delay, Mute, Phase, Gain etc.
• Limiters: LimiterMax with Peak and RMS limiter. Confi gurable MaxRMSLevel, MaxRMSCorner, MaxRMSAttack, MaxRMSRelease and MaxPeakLevel
• SuperModule compatible: Yes
• Audio Performance
• Conversion resolution: 24-bit
• Internal Sample Rate / Data path: 96 kHz / 32 bit floating point
• Product propagation delay: Best case (AES synchronous 96 kHz to AES synchronous 96 kHz via module) 0.871 ms Analog (Analog in to Analog out via module) 1.049 ms Pass thru (Analog in to AES synchronous 96 kHz bypassing module) 0.158 ms
• Maximum available user delay: 2 seconds
• Analog
• Inputs and Outputs: 4 inputs, 4 outputs
• Frequency response, analog-to-digital: +/-0.1 dB, 20 Hz to 20 kHz
• Frequency response, digital-to-analog: +/-0.03 dB, 20 Hz to 20 kHz
• THD+Noise, inputs: 0.00024% typical at 1 kHz
• THD+Noise, Outputs: 0.00037% typical at 1 kHz
• Dynamic range, inputs: 116 dB
• Dynamic range, Outputs: 115 dB
• Input impedance: 20 kOhm balanced, 10 kOhm unbalanced
• Output impedance: 50 ohms
• Maximum input level: +26 dBu
• Input sensitivity - settings for digital full-scale: +12 dBu, +26 dBu
• Maximum output level: 21 dBu
• Crosstalk, inputs: -98 dB, 20 Hz to 20 kHz
• Crosstalk, outputs: -98 dB, 20 Hz to 20 kHz
• Common mode rejection ratio (CMRR): >70 dB, 20 Hz to 20 kHz
• Dante Audio Network
• Inputs and Outputs: 4 inputs, 8 outputs
• Supported sample rates: 48, 96 kHz
• Support redundant paths: Glitch-free Dual Redundant Dante using two Ethernet networks
• Receiver latency: 0.5 ms, 0.8 ms, 1.3 ms, 4 ms
• Device presets
• Frame presets100
• AES3/EBU (sample rate converters available as desired):
• Inputs and Outputs: 8 inputs, 8 outputs
• Supported sample rates: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz (I/O individually selectable)
• Supported resolutions: Up to 24-bit
• THD + Noise: 0.00002 % at 96 kHz and 0.00006 % at 44.1 kHz sample rate
• Dynamic range: Base48 -140 dBFS, Base44 -125 dBFS
• Clocking
• Clock selection: Manual or automatic according to priority scheme
• Oscillator type / synchronization: High quality VCXO clock can provide Dante master clock or slave. Automatic synchronization with Dante network.
• Base48: 2 (Primary and SRC)
• Base44: 1 (SRC)
• Clock accuracy: < ± 7 ppm
• GPIO
• Inputs: 2 General Purpose Inputs (GPI) supporting external contact closure
• Outputs: 2 General Purpose Outputs (GPO) with internal contact closure
• Software configurable input control: Standby state, Mute state, Dual preset recall
• Software configurable output indication: Standby state, Mute state, Faults, Ready
• Back panel Interface
• Analog Inputs and Outputs: 4 + 4 XLR
• AES Inputs and Outputs: DB-25, with selectable termination
• Ethernet Ports: Auto 100/1000, Auto uplink, 2 x Neutrik etherCON RJ45 connectors
• GPIO: DB-9
• Power: Detachable locking 3-pin IEC
• Control and monitoring interface: Via Ethernet for Lake Controller software, or DLM (the 3rd party protocol)
• Front-panel user interface
• Display: Daylight readable monochrome (128 x 64)
• Meters: LED for signal level and clip indicators per channel
• Mute access: Dedicated Mute button and LED indication per processing channel
• Menu: Intuitive and powerful user interface with soft keys
• System status indication: LED Fault and Warning indication and detailed description on display
• Parameter adjustment: Single/multiple parameter edits with rotary encoder
• Power
• Nominal voltage: 100 – 240 VAC
• Operating voltage: 70-265 V AC
• Power consumption: 30 W maximum
• Dimensions
• Dimensions: 483 mm (19"), 44 mm (1 U), 290 mm (11.5")
• Weight
• Weight: 5 kg (11 lbs)
• Finish
• Finish: Black painted steel chassis with cast alumimum handles
• Approvals
• Approvals: CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC