Xewton Music Studio（1,700円）- iTunes Store

This iPhone/iPod touch application is a kind of old-fashioned desktop music software like Opcode Vision and MOTU Performer which can handle only MIDI data not audio data.

But it got two big tremendous charms ever than before.

1. PDA makes it much much better than desktop applications on portability.
2. Touch panel interface makes it much much better than YAMAHA QY series on usability. No, any existing tools never win at this point!

I can sketch and edit my songs while I'm away from home. Zap!!

And I'm looking so much forward to seeing New Garageband for iPad.