[alsa-devel] [2.6.30-rc2][PATCH 1/2] ASoC: OMAP: Fix DSP_B format in OMAP McBSP DAI driver

[Jarkko Nikula]

On Thu, 16 Apr 2009 12:33:58 +0200
ext Mark Brown <broonie at sirena.org.uk> wrote:

> On Thu, Apr 16, 2009 at 01:31:43PM +0300, Jarkko Nikula wrote:
> > ext Mark Brown <broonie at sirena.org.uk> wrote:
> 
> > > Could you try the test with no data on the left channel?  I
> > > suspect that the LSB of the left channel may be being processed
> > > as the MSB of the right channel.
> 
> > I'm wondering why the left channel is still playing fine?
> 
> If you drop the LSB of data it will normally sound fine but the signal
> level will be reduced - the effects are much less obvious when testing
> by ear than errors in the MSB.

I meant if there is one bit difference or bit clock polarity is wrong
then the both channels should be corrupted? At least the AIC33 is
behaving so.

I was thinking can the codec go out-of-sync during bit transmission
of left followed by right channel data and resynchronize back after next
FS change but this really sounds bit too far reason to me.


Jarkko