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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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Input Master Levels

Macros: InMstL, InMstR

These controls may not be present on all cards. Where present, they operate in tandem with the Line Level controls and simply extend their range.

As with the Line Level controls, the default units are steps, changing to dB if the card is calibrated and the dB button is active.


Macro Notes:

InMstL=3 sets the Left Input Master Level to step -3 if the Input dB button is off, or to the setting that gives the attenuation nearest to -3 dB if it is on. InMstR operates similarly for the Right Input.

Use an In_dB command before InMstL or InMstR to be sure the dB button is in the desired state.

Note that in dB mode the InMstL or InMstR value you use only applies to the Master control. There is no single command that adjusts both Line and Master Levels to achieve a specified overall dB value for that channel, as there is for the Generator Volume. The total dB value is, however, displayed next to the dB button.


See also Input Control 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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