Hi Alec,
Thanks for your response.
I want to do this with sequenzer files not midifiles.
So I give you an example.
In a certain song the lead voice changes in measure 54 ...and goes to panel memory 4.
The voice that is selected is to high..so I want the voice an octave lower.
I tried your solution...but I can't select a track. I just can select a measure .
I tried what you said in the measure 54 but when I tried it nothing was changed.
Did I something wrong.

Thanks ,
Alain