End to end audio test - initial drop

[Mark Brown]

On Mon, Nov 28, 2011 at 08:01:01PM -0600, Kurt Taylor wrote:

> 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

Might be worth looking at the similar loopback test that Lennart did to
measure the accuracy or otherwise of the dB info provided for volume
controls.