AJ, Say me if I am wrong :

The SD1 voices used when we played in live situation with arranger (PIANO, GUITAR... the good ones) Are in fact the same thing as PROGRAMS. Just Programes are user modifiable, and Voices no...

So if I m true, Why not publish the list of sounds used for make the internal SD1 Voices.

I say to ou why: I understand that for example the first sound GRDPIANO have 3 sounds : PianoL , PianoR and SubBass in bass keys...

If I know exactely what inside each program, I can use the SD1 in midi for recording or live with the good sounds !! not the GM ones !

I just bought a Kurzweil K2661 and in the manual, there is the list of each sound and what the sounds inside each sound...