[jornada] Re: Linux/Jornada Audio Pitch.

Hi,

On Tue, Mar 14, 2006 at 12:13:08PM -0500, jornada-request_at_handhelds.org wrote:
> All,
>
> For some time, I've suspected that the pitch heard while playing back
> audio under Linux on the Jornada is slightly off, but was unsure until
> tonight. It is indeed off a bit (too low).
>
> The audio sounds closer to what it should be when I supply the
> --downsample option to madplay, but this too is still a bit off.
>
> Any ideas as to what might be causing this?
You should first check which bitrate the sound you are using wants to be
played at. Then you should check which rate selection options
the driver source of the jornada sound chip has. Not all sound cards
support all bit rates, in fact (almost?) every single card has some
blind spots in their rate support, and many have support for very, very
obscure rates, so it's easy to imagine the driver being forced to choose
a rate that is an awfully close yet absolutely NOT perfect match to the
specific sample you want to play.
You should then try to enhance rate support for this chipset if possible
(some rate selection possibilities - possibly the one that you need -
may easily be undocumented, too!).

HTH,

Andreas Mohr

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