Open Source Audio Analysis Software

Audacity is a free, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. Audacity is free software, developed by a group of volunteers and distributed under the GNU General Public License (GPL). Programs like Audacity are also called open source software, because their source code is available for anyone to study or use. There are thousands of other free and open source programs, including the Firefox web browser, the LibreOffice or Apache OpenOffice office suites and entire Linux-based operating systems such as Ubuntu

This application allows you to test audio devices using your computer's sound card. A stereo line-level audio input is required, and support for sampling rates of 192 kHz or higher is desirable. The impulse tester is designed to study changes that occur in a non-periodic signal when passing through the electronic device being tested. Testing is performed by generating a single pulse, recording the original pulse shape on one channel, recording the modified pulse shape on another channel, and then comparing the shapes of the original and tested signals.