Hi everyone, Last week I did an initial drop of the end to end audio test we have been discussing.
The idea is fairly simple, play a sine wave and test the audio stack by sampling/testing the sine back in via loopback cable. The app is called testfreq and is driven by a script called e2eaudiotest. It opens and configures the audio device, takes a sample and then does a discrete fourier transformation to find the frequency using the fftw3 library. The test script driver uses speaker-test to play a sine wave at A 440, which for now is the test frequency. It's still basic at this point, but it does work on my system. There is a lot of additional things I'd like to do, initial stack configuration, passing in the device, passing the test frequency, doing more auto detection, clean up the code, etc, but I wanted to start getting feedback. Any and all would be appreciated. Have a look, and if you have a loopback cable, give it a spin: http://git.linaro.org/gitweb?p=people/kurt-r-taylor/e2eaudiotest.git You can also read more about it and check my progress here: https://blueprints.launchpad.net/linaro-multimedia-project/+spec/linaro-mmwg-e2eaudiotesting-basic Enjoy! -- Kurt Taylor (irc krtaylor) Linaro Multimedia Linaro.org <http://www.linaro.org/>* **│ *Open source software for ARM SoCs Follow *Linaro: *Facebook <http://www.facebook.com/pages/Linaro> | Twitter<http://twitter.com/#%21/linaroorg>| Blog <http://www.linaro.org/linaro-blog/>
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