What is this in short:
F11 will decrease volume and F12 will increase volume.
As most of you I also like listening to music with my PC. The best way nowadays is by using alsa capable audio application as xmms or amarok.
traditional way of mixing - kmix
kmix is a very nice tool for fast-volume settings but I need a even faster way - using the keyboard. Ok let's have a look at keybindings, it needs to be fast, so let's put it on F11 for decrease and F12 for increase.
Originally I've been using the mouse wheel over the corresponding icon in the "System Tray" but this means centering the mouse over the icon ... slow solution but good for not to frequent use IMHO.
let's find the according dcop switches
First let's have a look what we get running dcop kmix:
joachim@knabber:~$ dcop kmix qt MainApplication-Interface Mixer0 Mixer1 kmix kmix-mainwindow#1
Oh interesting, we have two soundcards listed at Mixer0 and Mixer1. I think you know best what soundcard you want to give the commands. Let's see what functions Mixer0 contains:
joachim@knabber:~$ dcop kmix Mixer0 QCStringList interfaces() QCStringList functions() void setVolume(int deviceidx,int percentage) void setMasterVolume(int percentage) void increaseVolume(int deviceidx) void decreaseVolume(int deviceidx) int volume(int deviceidx) int masterVolume() void setAbsoluteVolume(int deviceidx,long int absoluteVolume) long int absoluteVolume(int deviceidx) long int absoluteVolumeMin(int deviceidx) long int absoluteVolumeMax(int deviceidx) void setMute(int deviceidx,bool on) void toggleMute(int deviceidx) bool mute(int deviceidx) void setRecordSource(int deviceidx,bool on) bool isRecordSource(int deviceidx) void setBalance(int balance) bool isAvailableDevice(int deviceidx) QString mixerName()
Ha! We found it, let's now play with it, try these comamnds:
joachim@knabber:~$ dcop kmix Mixer0 setVolume 0 4 joachim@knabber:~$ dcop kmix Mixer0 setVolume 0 44 joachim@knabber:~$ dcop kmix Mixer0 setVolume 0 102
Oh this one is odd, we missed something, hehe!?
joachim@knabber:~$ dcop kmix Mixer0 increaseVolume Not enough arguments.
Ok, some more:
joachim@knabber:~$ dcop kmix Mixer0 increaseVolume 0
Running commands above should change your volume while playing a song with a alsa application.
Setting the global shortcut
After starting the "Control Center" you should go to "Regional & Accessibility" - "KHotKeys".
Remote application: kmix Remote object: Mixer0 Called function: increaseVolume Arguments: 0
Setting shortcuts is very useful, you should play around with dcop to find more useful posibilities. Creativity will help you!
May the force be with you.