[alsa-devel] snd-es1968 capture broken

Rene Herman rene.herman at gmail.com
Mon Mar 26 15:40:00 CEST 2007

On 03/26/2007 03:00 PM, Takashi Iwai wrote:

>> Capture is broken on snd-es1968, at least if it is driving a ES1970MS-3D 
>> (ESS Canyon 3D). The captured stream is "stuttering" like mad.
>> Kernel 2.6.20 (ALSA 1.0.14-rc1) with alsa-lib 1.0.11 (my distribution's 
>> version). Does not happen with a CS4236 in the same machine and same 
>> software version(s).
>> Don't know if this driver has a specific maintainer. If needed I guess I 
>> can try to pin it down to some change. I hardly use capture on this card 
>> but it wasn't always broken...
> What format and channels did you try? 

-f cd and -f dat

> The capture on maestro2 is troublesome because it uses
> non-interleaved format for capture.  So, recording a mono stream may
> still work.

Yes, you're right. All combinations of -f U8/S16_LE and -r 44100/48000 
work as long as -c is 1. With -c 2 the stutter is there.

> Also, to be sure, could you try the capture via oss emulation?

Works fine, no stuttering:

sox -t ossdsp -w -s -r 44100 -c 2 /dev/dsp foo.wav


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