Re: [Alsa-devel] cs64xx distortion (GameTheater XP)

[Benny Sjostrand]

I wonder what the status of the cs64xx distortion problem is.
I tested the 2003-01-14.tar.bz2 snapshot with my GameThaeter 7.1 XP

My opinion: the GameTheater XP it's a cheap soundcard with a beautiful blue box. Usually cheap soundcard got a cheap design as result of a tiny bugdet, so just dont expect to much from the analog part's.

Actually I got a Hercules GameTheater XP 6.1, when volume is over about a ~80% the output is sometimes distorcionated, but I believe that's something we cant do anything about in the driver. Limit some volume control's in the driver dont feel like a coherent solution.

The card is still usable, I really dont expect to better quality on analog output with this soundcard.

ALSA ../alsa-kernel/core/pcm_lib.c:123: Unexpected hw_pointer value (stream = 0, delta: -512, max jitter = 8192): wrong interrupt acknowledge?
ALSA ../alsa-kernel/core/pcm_lib.c:123: Unexpected hw_pointer value (stream = 0, delta: -512, max jitter = 8192): wrong interrupt acknowledge?
ALSA ../alsa-kernel/core/pcm_lib.c:123: Unexpected hw_pointer value (stream = 0, delta: -512, max jitter = 8192): wrong interrupt acknowledge?

Feel like theese messages should not be there, could be a bug in cs46xx driver.

I am wondering about the status, as there is still this comment in cs64xx_lib.c:
---------------------------
/* CD mute change ? */

/* Benny: this hack dont seems to make any sense to me, at least on the
Game Theater XP,
Turning of the amplifier just make the PCM sound very distorcionated. is this really needed ????????????????
*/
---------------------------

Should only matter if you unmute the analog CD input, and with the new DSP code it dont matter at all.

/Benny



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