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:



Spectrum Analyzer

Signal Generator

(Absolutely FREE!)


Pitch Tracker


DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Spectral Event

    MHz Frequencies

Data Logger

Waveform Averager


Post-Stimulus Time
Histogram (PSTH)

THD Meter

IMD Meter

Precision Phase Meter

Pulse Meter

Macro System

Multi-Trace Arrays

Trigger Controls


Spectral Peak Track

Spectrum Limit Testing

Direct-to-Disk Recording



Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery


Product test

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your application!

Multi-Channel Selects

Macros: FrontL, FrontR, Center, LowFreq, BackL, BackR, SideL, SideR

In order for a multi-channel output to be active, it must be selected here. The channel buttons are named:

    Front Left
    Front Right
    Low Freq
    Back Left
    Back Right
    Side Left
    Side Right

These names are used in Windows documentation and are appropriate for compatibility with "surround sound" installations. But for general-purpose use with Daqarta they may be regarded as arbitrary names for completely interchangeable channels. In particular, there is no special significance to "Low Frequency"; all channels can carry the full bandwidth. Likewise, there is no built-in processing to derive "Center" from normal stereo channels (assuming you have disabled all "special effects" as discussed under Multi-Channel Output Controls).

Note that your sound card may use different names for these channels, like 'Rear' instead of 'Back', or 'Bass' instead of 'Low Freq'. The output jacks usually have stereo connections, so you may just see 'Front', 'Center', 'Rear', and 'Side'. (Center is always paired with the Low Frequency channel.) The jacks may have cryptic abbreviations like 'F-Out', 'SS-Out', 'BS-Out', and 'C/B-Out'.

6-channel (5.1) cards typically use the first 6 channels and omit Side Left and Side Right.

You can verify the channel designations via a simple test using headphones that you plug into each jack in turn, while you change the Channel Select buttons and streams.

Macro Notes:

Macros for the 8 channel selects are FrontL, FrontR, Center, LowFreq, BackL, BackR, SideL, and SideR. To toggle a channel such as Center on, use Center=1. To turn it off, use Center=0, and to toggle to the opposite of the current state use Center=x.

See also Multi-Channel Output Controls, Signal Generator Control Dialog.


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