Re: CMI9780 and ALSA volume control

["Måns Rullgård" <mru@kth.se>]

Takashi Iwai <tiwai@suse.de> writes:

> At Mon, 12 Apr 2004 11:04:55 +0800,
> C.L. Tien <cltien@cmedia.com.tw> wrote:
>> 
>> 9780 has no PCM volume control, master volume control doesn't
>> control the PCM, either. This feature is the same as other C-Media
>> AC97 Codecs. 
>> 
>> I once posted a patch that tune PCM volume in SW way (change PCM
>> data in DMA buffer), but it was not accepted. 
>
> IMO, doing this s/w volume in the driver is not the optimal
> solution.  i prefer having this feature in alsa-lib. 
>
> the only drawback of implementing in alsa-lib is that the kernel OSS
> emulation cannot support it, and that would surely annoy people.

In a way that's a good thing.  If OSS doesn't work more people will
request ALSA support from applications.

-- 
Måns Rullgård
mru@kth.se



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