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!

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
    Center
    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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