end-to-end audio testing (jacks)

[Jassi Brar]

Hi Kurt,

On 27 September 2011 20:46, Kurt Taylor <kurt.taylor at linaro.org> wrote:
>
> These are really good ideas. I had started a discussion with Torez several
> months ago about an automated test for audio.  My idea at the time was to
> use a sine wav at a particular frequency and use or hack one of the
> tuner/freq analysis apps to detect the frequency. If it was too garbled or
> distorted, it wouldnt recognize the frequency.
I think, too distorted sine-wave is an easy kill and most probably
wouldn't even leave
the developers desk.
Usually when a developer calls it done, the driver plays clean enough audio.

In my experience, a commercial quality issue would show up in the form
of random/rare
phase jumps in the sine wave and/or stability in the long run.
While I always tested it manually, I think it should be possible to
write a simple
"sine-verify" application(or an alsa plugin?) that would analyze the
captured stream.

my two paise.
-jassi