I have duplicated some track.
I changed the content of all the tracks I've duplicated.
Now, I would like to change the midi instrument affected to each duplicated track ... but I can't.
When I change the instrument of one duplicated track, tuxguitar changes the instrument of all the duplicated tracks.
When I open the mixer, it shows that the tracks are "linked".
So my question is: how do I broke these links so as to be able to change all the instruments of my duplicated tracks ?
Open the mixer ( from menu "View -> Show Mixer" )
and take a look to the MIDI Channels ( these drop down selects )
use different channels for both tracks to unlink them.