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'''RightMark Audio Analyzer (RMAA)''' is a free and easy to use utility to quantitatively analyze audio hardware.  It generates a test wav file which can be played on one device and recorded on another.  Analysis of the test file can then be used to determine the frequency response, nonlinearity, and crosstalk of a test system and device.
'''RightMark Audio Analyzer (RMAA)''' is a free and easy to use utility to analyze your sound card.  It generates a test wave file and you use that along with another computer or a loopback cable to test your sound cards inputs and outputs.
The software has multiple modes, including loopback testing within Windows where one file is played and then recorded on the same device, and offline testing, where a file can be played on a hardware device (perhaps by burning to CD or copying to MP3 player) and then recorded (either by RMAA directly or into WAV). RMAA can then process the recording to determine changes introduced by playback. 
It doesn't appear to be a valid replacement for your frequency analysis tools.
===Testing using RMAA===
===Testing using RMAA===
Depending on what you want to test, you will most likely have to plug one device (the source playing the test file) into another (the recording device).
If you are testing a device driving headphones, you may need a splitter so that you can test with headphones connected. 
===What RMAA Can Measure===
* Frequency Response (of the combined test system and device under test)
* Harmonic Distortion
* Intermodulation Distortion
* Stereo Crosstalk
* Dynamic Range
* Absolute noise floor
===What RMAA Cannot Measure===
* The performance of a device independent of the test system
* Absolute level or output power
* Audibility of differences between devices
==External links==  
==External links==  
* [http://audio.rightmark.org/index_new.shtml RMAA home page]
* [http://audio.rightmark.org/index_new.shtml RMAA home page]

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