End to end audio test - initial drop

Ash Charles ash at gumstix.com
Tue Nov 29 05:35:17 UTC 2011

Cool!  Kurt, thanks for publishing such a useful tool; you will have
made many people who test Gumstix Overos happy that they don't have to
listen to inane audio samples each time a board is tested.


On Mon, Nov 28, 2011 at 6:01 PM, Kurt Taylor <kurt.taylor at linaro.org> wrote:
> 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 │ Open source software for ARM SoCs
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