changing what item Kmix controlls

TimmyP · 01-15-2005, 01:39 PM

hello all,

i recently switched back from gnome to kde, and have run into a problem. in the kde 3.3 kmix volume controll panel icon thing (wow...how technical) i can only controll the master sound output volume without opening the mixer. changing the master does nothing for my sound, only changing VIA DSX

does anyone know how to make it so that when i click on the kmix icon, i can controll the VIA DSX instead of master?

Qwindelzorf · 01-15-2005, 02:32 PM

I have the same issue. The master volume control does nothing whatsoever. PCM can be muted/unmuted to turn sound on and off, and VIA DSX actually controls volume. I have yet to find a good solution. My current plan is to whip up a couple of bash scripts to control the volume of the VIA DSX channel, and then use xbindkeys to bind the buttons on my keyboard to said scripts. This won't fix the problem, but will work around it.

- Stephen

foo_bar_foo · 01-15-2005, 03:11 PM

I don't think you can't controll that without messing with the source code
look at kmixdockwidget.cpp
and there is a line

Code:

 MixDevice *masterDevice = (*mixer)[mixer->masterDevice()];

then in mixer.h i see

Code:

 /// Returns the number of the master volume device */
      int masterDevice() { return m_masterDevice; };

so if you play with that return code you might be able to get what you want
m_masterDevice = 0; is in mixer.cpp

you can see what the mixer device numbers are by looking at ~/.kde/share/config/kmixctrlrc

once you do configure in the top dir of kdemultimedia you can move into kmix directory and do makes and make installs from there

Qwindelzorf · 01-15-2005, 04:13 PM

OK. I have finished the aforementioned script, and have a solution of sorts. Fiddling around with the innards of Kmix didn't work too well, so I whipped up a quick perl script that changes the volume of a specified channel by a specified increment. Not too nice, but it works. This script is then bound to the little volume spinner on my Logitech iTouch keyboard using xbindkyes. Hopefully this will be helpful to someone else as well.

- Stephen

volch.pl:

Code:

#!/usr/bin/perl

# volch.pl: volume changing script
#  Uses amixer to get the current volume, then uses amixer again to 
#  change the volume by a specified increment

use strict;

my $curr_vol;
my $target_vol;
my $increment;
my $channel;

if($#ARGV+1 != 2) {
    print "Usage: volch.pl <channel> <increment/decrement>\n";
    print "  ex: volch.pl \"PCM\" +3\n";
    exit;
}

$channel=$ARGV[0];
$increment=$ARGV[1];

$_=`amixer get '$channel' `;
/\[(\d{3}|\d{2}|\d)%\]/;
$curr_vol = $1;

$target_vol=$curr_vol+$increment;
`amixer set '$channel' $target_vol% `;

.xbindkeysrc:

Code:

# "Volume Up" on spinner
"volch.pl 'VIA DXS' +3"
  c:176
# "Volume Down" on spinner
"volch.pl 'VIA DXS' -3"
  c:174