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!

Jerky or Flickering Scrolling Display

In normal operation, Spectrogram and Pitch-to-MIDI output scrolls smoothly across the display area. If it is jerky (and/or MIDI sound has momentary pauses) it means that Daqarta is competing for Windows resources (time and memory) with some other program, even those that may be minimized to the system tray. Try closing them one at a time to find the worst offenders.

If the scrolling motion is smooth overall but the details seem to sparkle, flutter, or flicker (and MIDI sound is unaffected), that's a artifact of using increased Main Font Size to get a larger main window and trace display area.

The trace area is drawn internally at a fixed size corresponding to the default font setting of 8, and the resulting image is scaled larger when larger fonts are selected. The flicker is a result of Windows interpolation methods to stretch the display.

GO:

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