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!

Use Speaker Cal File

Controls: Calibration Menu >> User Units >> User Line
Macro: UserSpkr

This button is only present for Input lines. It is only enabled if the line has calibrated attenuators, and only if a Spkr .CAL or .FRD file has been loaded for the Output line on the same Left or Right side.

This button applies the Spkr .CAL or .FRD output correction to the input line, such that the input response is compensated for the driver response. In other words, if the input line had a mic with a perfectly flat frequency response (or was corrected via its own Mic .CAL file), then it would show a flat overall response to the speaker output, even though the true output wasn't flat itself.

A typical use for this option is for transfer calibration, where you use a calibrated reference microphone to calibrate other microphones.

Note that when Use Speaker Cal File is active on an input line, it disables the corresponding speaker file button on the output line so it can't be changed.

Macro Notes:

If the relevant User Line dialog is open, UserSpkr=1 will activate, UserSpkr=0 will deactivate, and UserSpkr=x will toggle the button state.

However, it is usually more useful for a macro to change User Line controls directly, without the dialog open. This requires that you use Uxx. prefixes before the macro command to specify which line the macro refers to, as in U0L.UserSpkr=1.

U0L. through U7R. specify Input lines 0-7 and the Left or Right channel of each.

If your card has only Master Input lines, UIL. or UIR. prefixes will specify them here.

If your card has only Master Output lines, specify them with UOL. or UOR. prefixes.

Otherwise, UWL. and UWR. prefixes specify Wave Out lines.

If a data file is open, UIL. and UIR. prefixes specify Left and Right Input lines, while UOL. and UOR. specify Output lines.

See also User Units dialog, User Line Dialog


Questions? Comments? Contact us!

We respond to ALL inquiries, typically within 24 hrs.
Over 35 Years of Innovative Instrumentation
© Copyright 2007 - 2023 by Interstellar Research
All rights reserved