Am Mittwoch, 8. März 2006 20:17 schrieb Lee Revell:
> On Wed, 2006-03-08 at 21:02 +0200, Милен Панков wrote:
> > Lee Revell написа:
> > > On Wed, 2006-03-08 at 11:43 +0200, Милен Панков wrote:
> > >> But there appears there is no an overall master volume.
> > >> I read everything I found in the mailing list archives and it seems
> > >> this
> > >> question is asked many times, but I found no answer given.
> > >> How can I control the overall volume of the card no meter if I play a
> > >> stereo or 6-channel sound? Is there a way to do this from the drivers?
> > >> And
> > >> if not is there a possibility to do this in some other way? I was
> > >> thinking
> > >> of making a softvolume in asound.conf called for example
> > >> 'GrandVolume'
> > >> where to attach as slaves all the controls mentioned above - for
> > >> stereo and
> > >> for 6-channel sound. I was trying for some time to make such a thing,
> > >> but
> > >> my understandings of the syntax of the file seems not to be so good
> > >> althought I read several times the explanations... Can somebody help
> > >> me in
> > >> implementing this if it is possible?
> > >
> > > This is a very old problem. There's no easy fix.
> > >
> > > Lee
> >
> > Ok.
> > But as I understand there is some possibility to fix this, although not
> > an easy one...
> > Where to look for some documentation on that, what to try? Am I on the
> > right way trying to find a solution with software mixer as I continue
> > trying with these attempts.
> > Thanks,
> > Milen
>
> Unless you can read and understand the emu10k1 driver code, you will
> have a very hard time. And if you can read and understand it you know
> what to do.
>
> The best workaround for the time being (if you can't simply reduce the
> volume in the app) is to just write a script that implements "Master
> volume" by controlling Front, Rear, Center/LFE at the same time.
>
> You can probably find such a script in the list archive.
>
> Lee
>
>
>
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Hi There!
I have discussed this topic for a very long time on this mailing list, too.
And guess what: a "good" (where good means pretty easy to realize) fix *is*
available. I have attached the patch file that does the job. You need to
recompile alsa drivers that for. with the Patch included you will have a new
volume slider that indeed sets the overall volume for all channels. Since i
am no developer i cant tell you exactly why this patch is not included in the
drivers, but for emu10k1 and sb live i have found out it works great. i am
using it with alsa-driver and -lib version 1.0.10 and have had no *real*
issues yet. unfortunately i know people reporting that this patch causes the
overall output volume to be a bit quiter than normal, but i cannot confirm.
Thanks again to whoever has send that patch to me.
Greetz
Christian Haertwig
Alsa User :)
diff -u alsa-kernel/pci/emu10k1/emufx.c alsa-kernel/pci/emu10k1/emufx.c
--- alsa-kernel/pci/emu10k1/emufx.c 23 Feb 2005 10:35:55 -0000
+++ alsa-kernel/pci/emu10k1/emufx.c 23 Feb 2005 10:37:52 -0000
@@ -934,7 +934,7 @@
return err;
}
-#define SND_EMU10K1_GPR_CONTROLS 44
+#define SND_EMU10K1_GPR_CONTROLS 46
#define SND_EMU10K1_INPUTS 12
#define SND_EMU10K1_PLAYBACK_CHANNELS 8
#define SND_EMU10K1_CAPTURE_CHANNELS 4
@@ -1803,6 +1803,19 @@
}
/*
+ * Master Volume
+ */
+ for (z = 0; z < 6; z++) {
+ SWITCH(icode, &ptr, playback + z, playback + z, gpr + 0);
+ VOLUME(icode, &ptr, playback + z, playback + z, gpr + 1);
+ }
+
+ snd_emu10k1_init_mono_onoff_control(controls + i++, "Master Digital Playback Switch", gpr + 0, 0);
+ snd_emu10k1_init_mono_control(controls + i++, "Master Digital Playback Volume", gpr + 1, 0);
+ gpr += 2;
+
+
+ /*
* Process tone control
*/
OP(icode, &ptr, iACC3, GPR(playback + SND_EMU10K1_PLAYBACK_CHANNELS + 0), GPR(playback + 0), C_00000000, C_00000000); /* left */
