I have a VA5 which has the exact same sequencer as your VA7.

Just to make sure. Are you doing the same that I do ?

1. Press Song Composter button
2. Select record.
3. Play your song and it is recorded
4. Go to 16 track sequencer to add more to your song using the free "free" tracks available.

5. When you select a "Free" track its stuck on piano

Is this the problem ? If yes tell me and I will tell you what to do.

Did you know that you even get a second drum set to add more drum sounds by hand to your song and you can choose any drum set you like as your second drum set.