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

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Voltmeter Channel (L.In, R.In, L.Out, R.Out)

Controls: Options >> Voltmeter >> L.In-R.Out
Macro: VoltCh

These four radio pushbuttons select the channel to be measured. (See the Multiple Meters Mini-App to simultaneously monitor up to two inputs and two outputs.)

The buttons are labeled L.In, R.In, L.Out, and R.Out.

If you are using Multi-Channel Outputs, use the Monitor As buttons to select which output channels will be reported as Left and Right Out.

Note that the output channels include any DC Offset you may have added to an output Generator stream, even though almost all sound cards are AC-coupled to remove all DC prior to the final outputs.

Input channels have already passed through an AC-coupled stage and will thus show only the residual DC, if any, from internal preamplifier stages. See DC Measurements And Outputs for ways to get true DC input response.

If you are using an Arduino board with the DaquinOscope macro mini-app to measure DC voltages, and its Channels control is set to 1, the L.In button will be replaced with Ch0. If it is set to monitor two channels then R.In will similarly be replaced with Ch1, while for 4 channels the buttons will be labeled Ch0 through Ch3.

Macro Notes:

Use VoltCh=LI to select Left Input, RI for Right Input, LO for Left Output, and RO for Right Output. Alternatively, you can use numeric values, variables, or expressions instead of mnemonic names:

    0 = LI
    1 = RI
    2 = LO
    3 = RO

Note that if you use a mnemonic in an {\b IF} test, it must be in quotes: IF.VoltCh="LI".

See also Voltmeter


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