Il ne separe pas les instruments mais les notes. Donc les resultats seront varies selons les morceaux.
Extrait de la FAQ :
Q: For what type of material is Direct Note Access suitable?
A: Direct Note Access is designed for single polyphonic tracks. You can use it for the quality targeted editing of a piano, a guitar or a string quartet. Optimum results are obtained with cleanly recorded signals to which as few effects have been added as possible.
Q: How about mixed signals i.e. where you have a piano and a guitar on the same track?
A: Direct Note Access recognizes notes in their harmonic and temporal contexts. It cannot detect which instrument has played which note. So if a piano and a guitar play the same note at the same time, you cannot edit the guitar separately. With Direct Note Access, you can access the note itself, which in this case means the signal of both instruments.