Diki's post reminded me of something... I'm not sure if it could be considered a full-fledged DAW. But I found an amazing app for my iPad called MIDIculous. Some of you know that I'm a chord recognition / style editing geek. I've been using MIDIculous to see the notes coming out of the BK-9's arranger engine, displayed on the grand staff in real time. It's great for that! (In the past I had to record the played chords to a sequencer, and then review the output in a score viewer. MUCH easier with MIDIculous!) FWIW.