Daqarta
Data AcQuisition And Real-Time Analysis
Scope - Spectrum - Spectrogram - Signal Generator
Software for Windows
Science with your Sound Card!
The following is from the Daqarta Help system:

Features:

Oscilloscope

Spectrum Analyzer

8-Channel
Signal Generator

(Absolutely FREE!)

Spectrogram

Pitch Tracker

Pitch-to-MIDI

DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Period
    Event
    Spectral Event

    Temperature
    Pressure
    MHz Frequencies

Data Logger

Waveform Averager

Histogram

Post-Stimulus Time
Histogram (PSTH)

THD Meter

IMD Meter

Precision Phase Meter

Pulse Meter

Macro System

Multi-Trace Arrays

Trigger Controls

Auto-Calibration

Spectral Peak Track

Spectrum Limit Testing

Direct-to-Disk Recording

Accessibility

Applications:

Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery

Automotive

Product test

Contact us about
your application!

WhiteMute.GEN Setup File - Uniform Random Number Source

WhiteMute.GEN is simply a White Noise source with the Wave output muted in the Generator Volume Slider dialog (F9 key). Even though the generated noise doesn't go to the sound card DAC to create actual sound, it is still available within Daqarta as a high-speed stream of uniform random values.

These random values can be read into Macro Arrays (Buf0-Buf7) and used as a basis for other calculations. (Note, however, that the number range is only 2^16, or from +32767 to -32768. For other ranges (up to 2^64) you can use the rnd() or rand() Macro Math Functions with arbitrary limits.)

WhiteMute.GEN is used by the Arbitrary Random Distribution Mini-App as a source with uniform (flat) amplitude distribution, for comparison with the arbitrary distribution (such as Gaussian) that the mini-app creates.

WhiteMute.GEN can also be used to replace the internal uniform random source used by DaqMusiq, then use Spectrum Curves to control the "brightness" or "darkness" of the generated music based on the relative distribution of high (bright) and low (dark) frequencies used by the Pitch Tracker. You can then use that with any .DQM MIDI setup that would normally use the internal uniform source.

Note that for Windows Vista or later the above technique will require the workaround discussed in the Vista/7/8/10 and DaqMusiq subtopic under Vista / 7 / 8 / 10 Issues in the Troubleshooting section.


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