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!

File Menu

You can invoke the file menu from the menu bar, or directly via ALT+F.

There are two basic categories of Daqarta data files: Single-screen files that capture a fixed 1024 points per channel (which may be averages of many individual frames), and DDisk (Direct-to-Disk) files that capture a continuous data stream of arbitrary length. Either type of file may contain mono or stereo input and/or output channels.

Daqarta can read and write several different file types. Besides the standard .WAV format, Daqarta offers its own .DQA file type. This is essentially a .WAV file with added information about relevant Daqarta parameters such as calibration and averaging, as well as Notes, Labels, and Fields. It is the preferred format for data files.

Daqarta also reads and writes headerless raw data files. These are referred to here as .DAT files since that is the extension used when saving them. But you can open a file with any extension, and if Daqarta doesn't recognize it as .DQA or .WAV it will treat it like a .DAT file, allowing you to specify the data format for opening it. If the file is not actually headerless, you can tell Daqarta to skip over a specified mumber of bytes. This allows you to open files of practically any format.

In addition, Daqarta can write .TXT files of plain ASCII text. This format allows subsequent analysis by other programs that accept text input. It can open .TXT (or .CSV) files of single-channel data containing up to 1024 samples for viewing, or up to 16384 samples for use as Arb data.

Daqarta also allows creation of special .CAL, .FRD, or .CRV files to be used for frequency response correction, or .LIM files for Spectrum Limits testing.

After successfully opening a .DAT or other unsupported file, you can save it as .DQA, .WAV, or .TXT. If the file is longer than 1024 samples per channel, only the current 1024 samples will be saved. This allows you to convert or extract data from unsupported files.

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