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!

Windows Sounds Interfere

By default, Windows assumes you want to be notified with a sound (typically a chime) whenever various program events take place, such as when a message pops up or new mail arrives. Although this is almost always inappropriate when Daqarta is running, Daqarta cannot suppress these sounds automatically.

To turn them off, you must go to Start - Control Panel - Sounds and Audio Devices and click on the Sounds tab. In the dialog that appears, go to Sound Scheme and use the scroll button on the right to select No Sounds.

Under Vista or Windows 7, 8, or 10 you can right-click the little speaker icon in the system tray and select Volume Mixer, then mute the Windows Sounds by clicking the little speaker icon below the slider. You should probably mute any other applications as well... or better yet, close them completely. See below.

Note that Daqarta automatically blocks the annoying beep that Windows inserts when the Master output slider is changed via the Windows Mixer. (Daqarta's own controls never invoke the beep.)

In addition to Windows sounds, some systems (at least XP and later) can secretly reserve part of the sound card range for other sound applications, allowing them to interfere. Make sure all other sound applications are completely closed when Daqarta is running.


See also Sudden Calibration Shift, Calibration Menu, Troubleshooting

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