MicroDAC 5 User's Manual - Digital Audio Corporation

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Audio Output (1):o TOSLINK optical interface, constant 24-bit data resolution and44.1kHz sample rate Control Interface (1):o USB 2.0 full-speed interfaceo Windows-based interactive control and programming utility Processor Functions (DSP #1):o 4500-tap (at 5kHz BW option) adaptive FIR stage, configurable as:• 4500-tap monaural 2CH filter• 2 x 2100-tap monaural 3CH or stereo 2CH filter• 3 x 1400-tap monaural 4CH filter• 4 x 1050-tap stereo 3CH filtero Adaptive filters derate to 2100 and 1000 total filter taps at 10kHzand 20kHz bandwidths, respectively Processor Functions (DSP #2):o 2048-tap at 5kHz BW, 1024-tap at 10kHz BW, 512-tap at 20kHzBW stereo 1CH adaptive predictive deconvolver stageo Stereo highpass filter stage with cutoff at 200, 250, or 300 Hzo Stereo automatic gain control (AGC) with maximum boost of 40dB Algorithms:o Time-domain, continuous adjustment, Normalized Least MeanSquare (NLMS) for all 1CH, 2CH, 3CH, and 4CH adaptive filterso Automatic “crash detection” and clearing for all adaptive filterso Fourth-order Butterworth IIR implementation for 200Hz highpassfiltero Time-domain, peak-sensitive, envelope tracking compressor with“lookahead” for AGC Cancellation Capability:o >70dB for 1kHz sine wave (1CH mode)o >60dB for white noise (2CH, 3CH, 4CH modes) Processors:o Dual 300MHz TMS320C6713 floating point DSP, 4.8 billioninstructions/second peak speed, 3.6GFLOPSo 109 million floating-point adaptive filter taps/second Computation Precision:o 32-bit IEEE floating-point, single precision Signal Delays:o 4096 total samples available for primary or reference channels onDSP #1o 64 total samples available for 1CH prediction span on DSP #24.4 Physical8.5”W x 1.7”H x 6.6”D chassis, 8lbs.1U rack mounting kit availablePage 10
5 MicroDAC 5 Configuration Utility Overview5.1 IntroductionThe MicroDAC 5 Configuration Utility allows for complete setup and intuitive,interactive control of all the audio processing on the MicroDAC 5, via USBconnection between the hardware and a Windows®-based PC.The software can be used to control the MicroDAC 5 unit in real time. Once youhave decided on the appropriate settings for your target audio, all processingsettings can be saved in nonvolatile memory on the MicroDAC 5 for stand-aloneoperation without the computer connection. In addition, favorite configurationscan be saved on the PC and subsequently recalled.5.2 Main ScreenAn image of the main window for the MicroDAC 5 Configuration Utility is shownbelow in Figure 5-1. The signal diagram represents the flow of the audio signalgoing from left to right. On the right hand side, you can select which filters youwant in the signal chain and the system bandwidth.Figure 5-1: Main Configuration Utility ScreenPage 11
Page 1: Multi-Channel Reference CancellerUS
Page 7: 1 Overview1.1 IntroductionMicroDAC
Page 11: 3 Standalone ControlsControls on th
Page 14 and 15: 3.1.4.5 Clear FiltersUse the CLEAR
Page 18 and 19: 5.3 FiltersFour different filters a
Page 20 and 21: Figure 5-3: Mono sub-menuIn mono mo
Page 22 and 23: Figure 5-6: Mono 4CH5.6.2 Stereo Co
Page 25 and 26: 5.6.3 Audio Line Out ConfigurationB
Page 27 and 28: are stored in nonvolatile memory on
Page 29 and 30: they are “out.” Taking one of t
Page 31 and 32: 6 FiltersTo configure a specific fi
Page 33 and 34: samples and in milliseconds. Minimu
Page 35 and 36: Slower adapt rates take longer to r
Page 37 and 38: Figure 6-4: Automatic Gain Control
Page 39 and 40: 7 InstallationTo install the MicroD
Page 41 and 42: 3. After the .NET install completes
Page 43 and 44: 7. Next, before running the MicroDA
Page 45 and 46: d. Once the driver has finished ins
Page 47 and 48: 3. You will be presented with a “
Page 49 and 50: 7. You may see another “unidentif

MicroDAC 5 User's Manual - Digital Audio Corporation

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