It's pretty common to use a 25 key controller with a sound generator at the top of another keyboard to emulate left-handed bass. Same keys as a full set of pedals.
I do it all the time. Works GREAT!
R.
Thats indeed true... Forgot about that...
But then, i am spoiled with 88 + 76 keys.. No need for specific bass keys..
But basskeys indeed never crossed my mind, only 37 keys for solo performances, which work better with 2 octaves, tough bass probably never needs more then 2 octaves..