Hmmmm .... thought I responded to this question. (gremlins?)
Anyhoo - I often start a song acapella (with harmony), and then kick on the drums. Yamaha doesn't allow the harmonies to appear unless the rhythm is running. (it may, in vocoder mode, but I use chord mode). This setback (for me) also makes it impossible to hold out a long note after the style has stopped. That's another thing I do a lot.