Jerry,
My X1 will read dd disks o.k. And it will read both types midi files.
It will also transpose while the song is playing. I think I misinformed you about this, or at least agreed with you when you mentioned it.
To transpose during playback, you have to turn lyrics (if any) off, then push "exit" to get to the main screen. Activate "transpose" if it is not active. Then you can use the + and - buttons to change keys. You can also elect to change the the key of the keyboard independently so you can play along with the sequence in a key that is comfortable to you.
One note, the next sequence will also be transposed unless you change the transposer back.
As far as taking a floppy out while the song is playing, I haven't tried that, because I copy the few sequences I use to the hard drive and play them from there because it is so much quicker.
Regarding the editing, someone else will have to handle that one. I usually play everything live, and when it starts getting too complicated, I don't do it!
email me if I can help.
Good luck,
Don
Don

[This message has been edited by DonM (edited 12-10-1999).]