Hello Fred,

If Gary gets wind of this conversation, I don't think he'll have a problem with complaints that GPO itself offers MIDI controllers as its user interface, and not the actual graphical user interface, which is the job of the notation or MIDI sequencing program.

Why does GPO use the Mod Wheel for volume level? That's so that the user at the MIDI keyboard can, with a fairly high degree of dexterity, control the nuances of the volume curve of individual notes, in real-time, as he's recording, with the joy-stick on his MIDI keyboard. It's actually a lot of fun to control the volume level with the joy-stick, and generally much more useful than controlling modulation, the originally intended role of the joy-stick.

Cheers
-- Mark