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!

Sound Card Tone Frequency Dialog

Controls: Gen Dlg >> Stream >> Tone Freq
Macro: FreqDlg

The Tone Freq button and associated frequency control appear when the Wave type is repetitive. Clicking the button opens the Tone Frequency dialog.

When the Wave type is Play, the button changes to Play Rate and the control becomes a multiplier (labeled 'X' instead of 'Hz') of the original rate. (But see the Play Rate Absolute / Relative control in the Play dialog.) Clicking the Play Rate button still opens Tone Frequency dialog.

When the Wave is one of the Noise types, the button changes to Timing and opens a special Timing dialog if clicked. The control below the button is typically the Smooth TC value from the Timing dialog.

If all you wish to do is change the frequency of a wave (or playback rate of a Play file), you may use the Tone Freq (or Play Rate) control directly. If you click on the button, the Tone Frequency dialog allows control of not only the frequency or rate, but also the phase and Gen Sync resolution. In addition, there are controls to select when the phase should be reset, such as at the start of each Burst or Sweep. You may also change the frequency entry mode to make it easier to enter frequencies that fall on certain values.

For convenience, the Phase, Frequency, and Frequency Entry Mode controls are also duplicated in the AM, FM, and Phase, Modulation dialogs. The Sweep dialog includes duplicates for Frequency (as the Start frequency) and Frequency Entry Mode, but not Phase.

Tone Frequency Dialog:

If the Wave type is set to Play, then the Tone Frequency header changes to Rate and the dialog then controls playback rate (either absolute or relative to the current sample rate).


Macro Notes:

FreqDlg=1 opens the Tone Frequency dialog if the Stream dialog is open and the Wave type is repetitive, FreqDlg=0 closes it, and FreqDlg=x toggles between open and closed.

This same command opens the Random / Step Timing Dialog if Wave is set to one of the Noise types, or to an Arb or Play wave if its Interpolate/Round/Step control is set to Step.

Note that you do not need to open this dialog to change any of its controls directly via macro command. You can even change those controls when the Wave is non-repetitive and this dialog can't be opened, though such changes will produce no effect until the Wave is changed to a repetitive type.


See also Random / Step Timing Dialog, Waveform Stream Controls.

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