[alsa-devel] Questions about alsa driver for i.Mx27 + wm8974: playback time shorter than the original record time

[Randolph Chung]

>> What's the possible reason causing the incorrect faster playback speed?
>> Any suggestion is appreciated.
>
> Normally this will be the result of either an incorrect frame rate or
> the hardware trying to play back mono data as stereo (which will cause
> data to be consumed as twice the expected rate).

Although I have only seen this on capture, another possible reason for
this is due to the way the SSI registers are setup on the MX27.

Eric Bénard's patches that are in the latest kernel fixed a similar
problem for me. The eukrea audio machine driver was a good reference.

randolph