Re: [alsa-devel] Intel card master and PCM channels doesn't work

13 Aug 2009

      At Thu, 13 Aug 2009 10:55:38 +0300,
Mantas Pilipavičius wrote:
...
Can you explain more detailed? What is data manipulation?
You need to change all the stream data multiplying the volume
gain/attenuation in software because you hardware gives no volume
control by itself.
In the case of alsa-lib, it's softvol plugin.  Or, if you use PA,
PA does it automatically.
Takashi
...
On Thu, Aug 13, 2009 at 8:41 AM, Takashi Iwai tiwai@suse.de wrote:
At Thu, 13 Aug 2009 00:39:48 +0300,
Mantas Pilipavičius wrote:
>
> http://www.alsa-project.org/db/?f=
afa01dd48ed59d895d18407af62dbd1fa138686c
> Everything works great, I can play the sound, but PCM and Master
channels
> don't work, so I can't increase or decrease volume. Only thing I can do
is
> mute/unmute PCM channel

This hardware has no volume control indeed.
The volume has to be adjusted in software by data manipulation.

Takashi