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!

Removable Drive with Multiple Systems

Controls: Edit Menu >> Start Preferences >> Device

Daqarta allows installation to and running from a folder other than Program Files, enabling operation from a removable drive such as a USB flash memory stick. This also allows non-Adminstrator users to install and run Daqarta on Windows XP (which restricts access to Program Files).

Note that if you run from a removable drive, any calibration you perform will only work with the sound card in use at the time. Moving the drive to another system will result in uncalibrated operation. See file naming instructions under Saving the Calibration.

A strategy similar to that described under Managing Multiple Devices can be used when you run Daqarta from a removable drive and want it to work with the internal (or USB) sound cards of multiple systems.

The most reliable approach is to create a separate batch file to use with each target system. Start Daqarta normally from the USB drive and note which Output and Input Device numbers are needed for the system, typically 0 for both. Those will go into the O:n and I:n parameters. Then assign a unique letter or number for each system, to be used with the N:n parameter. For example, if you have 3 systems, you could assign A, B, and C. Then use Windows Notepad or another text editor to create a batch file for each system, which can consist of only a single line like:

Daqarta.exe O:0 I:0 N:A

Give the batch file a relevant name like Daqarta-A.BAT and save it in the Daqarta folder of the removable drive. Or, if it is more convenient, you can put it in the root directory (folder) as long as you include the path to the Daqarta folder:

Daqarta\Daqarta.exe O:0 I:0 N:A

Now when you move the drive to another system, just run the appropriate batch file to start Daqarta. If your system prompts you with a list of options when you insert the drive, you can select "Open folder to view files"; otherwise, navigate to the batch files using Start - My Computer.

Alternatively, it is possible to set up a desktop shortcut on each system, as discussed under Managing Multiple Devices. The problem with this is that the shortcut Target command line needs a specific path, including a drive letter, to find Daqarta on the removable drive. But such letters are not permanently assigned: If a different removable drive is plugged in before the one with Daqarta on it, the assigned drive letter may no longer be correct.


See also Managing Multiple Devices, Removable (USB) Sound Cards, Sound Card Performance Tests

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