[alsa-devel] [PATCH] Add support for gain in softvol plugin

Takashi Iwai tiwai at suse.de
Mon May 14 11:26:03 CEST 2007

At Thu, 10 May 2007 12:57:10 -0700,
Steve Longerbeam wrote:
> Hi Takashi,
> Thanks, that's much better. I tried doing that myself a while ago, but I 
> must have been doing something wrong because the capture device wasn't 
> being recognized. But your version works.
> Version 4 of the patch is attached. It's much better, only two modified 
> files: pcm_softvol.c and HDA-Intel.conf.
> I also reduced the gain range, it's now -30 to +30 dB.

I'm afraid that this choice would be bad for the current TLV
representation.  The default resolution is 256, so -30/30 dB range
doesn't match to this resolution.  We should change either resolution
(e.g. 120, corresponding to 0.5dB step), or the range.

Otherwise it looks fine to me.



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