Ok I already boost volume on canola,

first find the atakabe folder.

the atakabe folder and then the config file is locate it in

/home/user/.atakabe/ #the point "." is for hide folders so you won't see it with ls on user.

then open the config file with vi

vi config

there you will see something like this.


where you see "audio = oms" change it for "audio = mplayer"
save the file.


now to boost mplayer

go to /home/user/.mplayer/

then vi mplayer.conf

you will see this

Add this line
and save

test it.
You can change the 15.1 for a bigger number to test another results. This one works for me.


NOTE: I am a newbie and this works for me, do it at your own risk. Please make back ups of the files are you going to modify.

Note:

af=volume=<v>:<sc>

Where

* <v> is the desired gain in dB for all channels in the stream from -200dB to +60dB, where -200dB mutes the sound completely and +60dB equals a gain of 1000 (default: 0).
* <sc> Turns soft clipping on (1) or off (0). Soft-clipping can make the sound more smooth if very high volume levels are used. Enable this option if the dynamic range of the loudspeakers is very low.