[alsa-devel] Query regarding sampling rates etc
pharaoh137 at gmail.com
Wed Jul 11 13:30:12 CEST 2007
On 7/11/07, dustin at seznam.cz <dustin at seznam.cz> wrote:
> Exactly, this sounds like when I was sending left-aligned serial audio
> instead of I2S format from ice1724 to the codec. Low volumes were OK, higner
> > ------------ Původní zpráva ------------
> > Od: Liam Girdwood <lg at opensource.wolfsonmicro.com>
> > Předmět: Re: [alsa-devel] Query regarding sampling rates etc
> > Datum: 10.7.2007 23:18:21
> > ----------------------------------------
> > On Tue, 2007-07-10 at 19:32 +0530, Pharaoh . wrote:
> > > Hi,
> > > This is a very vague question, just thought of asking it after hours
> > > debugging.
> > >
> > > I am testing my alsa driver, written for omap 730/850 based board. I
> > > testing it by using aplay.
> > >
> > > Despite checking clocks, sampling rates etc many times and after
> doing many
> > > combinations thereof, I cant hear anything more than a noise which
> > > and becomes more like the original .wav file as I change various
> params like
> > > sampling rates/clocks etc. It becomes close to the actual thing, but
> > > better.
> > >
> > > Any idea what are the params I should be tweaking? I know this is h/w
> > > dependent.
> > >
> > Sounds like (no pun intended) your digital audio interface is not set
> > correctly between your codec and CPU. It's probably best to make sure
> > they are both using the same I2S or PCM modes.
> > Liam
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel at alsa-project.org
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
Okay, got it. But in this case wont the data on i2s line get corrupted?
I could see correct data being passed on i2s data line, I tried with some
unique patterns and the 2's compliment was visible on the data line.
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