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!

Input dB Toggle


Macro: In_dB

If your sound card attenuators have been calibrated, this button causes the Line and Master Level controls to show actual attenuator dB instead of the default step units.

The total attenuations including Master (if present and calibrated) for the Left and Right inputs are also shown on either side of the dB button. If your card doesn't have Master Input controls, these readouts will just mirror the line control values.

Note that if you select an input line that has not been calibrated yet, the dB button will remain active but the total attenuation readouts will vanish and the controls will revert to step units.

dB mode allows scrolling of the Level or Master controls such that only real attenuator steps are selected, skipping all the dummy steps that Windows inserts to make slider controls appear to have more resolution. So the true input sensitivity will change on every scroll step.


Macro Notes:

In_dB=1 the dB mode, In_dB=0 sets step mode, and In_dB=x toggles between the two modes.

Note that the state of the dB button controls the units of the InLineL and InLineR Line Level commands (as well as InMstL and InMstR, if your card has Master Input Level controls.) Use an In_dB command before these to be sure you don't get step -3 instead of -3 dB.


See also Input Control Dialog

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