I use muse2 trunk on mageia 1 32 bits.
I added a synth track with deicsonze. I set the parameters of deicsonze (I select a synth).
I added a midi track.
I start recording some chords.
Then I replay (I hit the button "go to start" + the plaay button).
Muse2 play the chords but with the default deicsonze parameters.