Diki wrote:
"We also need to put pressure on the arranger makers to allow us to make ANY track a 'drum' track - in other words, even if it uses a melodic element, not
just a drum kit, we should be able to disable the transposing of it when we change chords in the left hand (I don't know of any arranger that does this,
but I'm only really familiar with Rolands)."

This can be done on the Gem Genesys. I can get 8 drum tracks in a style on the Genesys and the track does not transpose when you change left hand chords. Actually, Gem has had this feature to my knowledge since 1997.