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!

Max Level Attenuation


Macro: UseMaxLevel

When Use Level is active, this control specifies how far it can go. Normally, the effective Level adjustment is no bigger than needed to reach the next attenuator step, typically a few dB at most. This allows the highest output quality (minimum quantization noise and distortion). But when you try to reduce the sound lower than the combined range of the Wave and Master attenuators, the Level control may be called upon to provide more adjustment. The default here is to allow up to 96 dB to be provided by Level, which is essentially the entire range of a 16-bit sound card. When the overall combination of Wave, Master, and Level is exceeded, the output is put into the 'Off' condition. If you restrict the maximum Level contribution, the Off condition will be applied sooner.


Macro Notes:

UseMaxLevel=60 sets the Max Level contribution to the equivalent of 60 dB.

UseMaxLevel=>1 increases the Max Level value by 1 dB, and UseMaxLevel=>-1 decreases it by 1 dB.

Note that this command is enabled only when both Use dB and Use Level are active. Otherwise, the macro may abort with an error message. To be safe, give UseCal=dB followed by UseLevel=1 before UseMaxLevel.


See also Generator Attenuator Options Dialog.

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