Was wondering if anyone here owns the DR-770... I have a specific question. Is it possible to key in a drum chart transcription, note for note, into the unit so I can play it back to learn the riff? I know there is software capable of this, but I'd like to have a multipurpose tool to use for more than one musical application, rather than software in my pc... I vaguely remember the Roland R-8 Drum Machine doing something like this... Any help would be greatly appreciated. Thanks so much, Gino C.