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

Contact us about
your application!

Prompt Volume Change

Controls: Edit Menu >> Run Preferences >> Volume Change
Macro: PrefVolChg

Output Volume or dB settings are saved as part of a Daqarta Generator setup. This box is checked by default to indicate that Daqarta will prompt you to save any volume changes with the setup before loading a new setup or exiting Daqarta. Uncheck this to avoid the prompt.

You may want to uncheck this box for casual listening experiments with Daqarta, where you don't care if you start with the same volume next time.

Another typical reason to uncheck it is for experiments that use a standard protocol that requires the same initial volume on every session. For example, you may be measuring hearing thresholds on different subjects in separate sessions, where each subject must get the same initial sound, after which the volume will be adjusted up or down until the detection threshold is determined. If no other changes are made to the setup, there is no point in saving these volume changes since the next subject must begin with the standard initial volume.

If your sound card uses a custom mixer that denies access to Daqarta, this parameter is ignored.

Macro Notes:

PrefVolChg=1 activates this option, PrefVolChg=0 cancels it.

Note that volume changes made directly via macros never cause exit prompts. However, a macro may request the user to make a manual change, for example, and then wait for a confirmation action such as hitting the Spacebar key. That would cause an exit prompt if this option is active.

The macro can prevent the exit prompt via PrefVolChg#X=0 after the confirmation action. Conversely, it can force an exit prompt (if this option is active) via PrefVolChg#X=1 (or any other non-zero value).

See also Run Preferences Dialog


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