CONVOLVER AUDIO HIJACK SERIES
Of the Hypersignal®-Macro Series "Hardware Reference Guide".
For precise information about hardware, please contact Signalogic about obtaining a copy Words (16-bit values) as well as 32-bit values. Marked with "**" can be packed double because the memory is accessible in Recommended amount that should be shipped with the board, and actual stimulusĪrea available (excluding program area and input buffers). (natural wordlength of DSP device) and given in two values: Signalogic Hardware ahead of time if exact and/or maximum stimulus lengths are important.īelow is a short list of example DSP/analog boards, the amount of data memory availableįor use by Hypersignal-Acoustic when shipped with Signalogic-recommended memoryĪmounts, and the maximum stimulus size. It is important to remember that some DSP hardwareĬan achieve only certain sampling rates, so it is a good idea to know something about DSP/analog To the nature of the MLS process, which requires stimulus lengths to be a power of 2 minus 1 forĮxample, 4095, 8191, 16383, 32767, and 65535. The MLS function requires that stimulus length should be entered in seconds it then calculates anĪctual stimulus in samples by taking the entered value, multiplying it by the entered sampling rate,Īnd quantizing the result upwards to the nearest allowable MLS length. Response waveforms for the device under test. To perform the stimulus & response operation, then synchronously averages the results in the timeĭomain, and finally performs cross-correlation and FFT operations to calculate impulse and frequency It uses the currently installed DSP/analog hardware User inputs such as stimulus length, number of averages, output waveform filename, sampling frequency,Ĭhannel list, and stimulus amplitude and offset. MLS Stimulus & Response The MLS (Maximum Length Sequence) stimulus & response function in Hypersignal-Acoustic includes The original magnitude response it can also be applied in real-time using theġ/N Octave Band Display Option in Spectrum Analyzer The 1/N Octave Band display option allows log-magnitude traces (either real-time analog input or waveform file input) to be viewed in common acoustic/audio formats such as 1/3, 1/6, and 1/12 octave band. The resulting FIR filter can be used to equalize The inverted magnitude response and unchanged phase response are converted to real and imaginaryĭata which is iFFT'd into the time domain. Real-time input or waveform file input), then creates an inverted magnitude frequency response. Macro function in Hypersignal-Acoustic first freezes the Spectrum Analyzer display (either In the case of waveform files,ĭata can be imported from Techron ".TDS" format, or from Ariel SYSid format. Spectrum Analyzer analog input channels, or from waveform files. Below is a partial description of functions and display/instrument options found only inĮqualization Input for equalization processing in Hypersignal-Acoustic can come from either real-time
CONVOLVER AUDIO HIJACK SOFTWARE
Hypersignal®-Acoustic is a superset of Hypersignal-Macro software for a description of functions common to both packages, click on Hypersignal®-Macro software. Home > Products > Software > Hypersignal®-Acoustic