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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.
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Preferences - Sound Card Device Selects

Controls: Edit Menu >> Preferences >> Device
Macros: DevOut, DevIn

This pair of controls at the top of the Preferences dialog allows you to select which sound card to use when you have more than one installed. If you wish to use different cards or USB devices for different Daqarta sessions, see Managing Multiple Devices. (If you only have a single card, these controls are disabled.)

There are separate controls for Output and Input devices, with the corresponding device descriptions above each control. As you scroll the device number, its description will change to match.

Note that changes here don't take effect until the next time Daqarta starts.

Although the Output and Input device controls are separate, you should always set them to refer to devices on the same card. Otherwise, slight differences in the cards' internal clocks will cause input and output data to drift out of synchrony.

(This cumbersome dual-control method is necessitated by the fact that many sound cards now structure their inputs and outputs as separate devices, indistinguishable from physically distinct cards.)

If you have only one Output or Input device in your system, the relevant control is disabled.


Macro Notes:

Attempting to change a disabled control via macro will result in an error message, and the macro will be aborted.


See also Preferences Dialog

Applications:

Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery

Vehicle pass-by noise

Product test

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