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!

DAT File Format Dialog

Controls: DD/Open >> DAT Format

This dialog appears whenever you attempt to open any file that Daqarta determines is not a valid .DQA or .WAV file, regardless of its actual extension. Daqarta calls such files .DAT files.

Since Daqarta can't read the format from the file itself, this dialog allows you to specify it manually. If the file actually has a header (which Daqarta can't understand) preceding the data, you can tell Daqarta how many bytes to skip. Otherwise, the file is treated as headerless raw data.

Once you specify the data format, Daqarta will dutifully use it when opening the file. If you see what appears to be garbage, you can try opening the same file again with a different format.

The .DAT options allow you to view the contents of files that were created on other systems with incompatible or even unknown formats. Once you have the proper format, you can then save a copy as a .DQA or .WAV file that Daqarta understands, or as a .TXT file for some other program, and you won't need to use the .DAT dialog in the future. If the file is longer than 1024 samples per channel, only the current 1024 samples will be saved.

(Alternatively, you can create a custom macro to convert all of a longer .DAT file into .DQA, .WAV, or .TXT using file operations on Macro Arrays. See the WAV File Stereo-to-Mono Macro for a general approach to file conversion.)

Note that Arb and Play files for use with the Daqarta Generator may also be .DAT files, but since they must be able to be loaded automatically from the .GEN setup they are always assumed to be mono signed 16-bit format by default.

If you have some other format that you wish to use for Arb, open it as a data file, set the proper format in the .DAT dialog, and save a copy as a .DQA or .WAV file for later loading by Arb. Since you can only save files of 1024 samples per channel this way, the method is not useful for Play.

Arb and Play files may only be Mono or Stereo, though you can have 4-Chan .DAT for normal data files.


See also File Menu, Open Existing Data File


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