Registered: 12/06/99
Posts: 2133
Loc: Muskegon, MI
I am now the owner of Don Mason's Sd-1. I didn't pay attention when operating systems were discussed because I was playing a Yamaha Tyros then. My Sd-1 is using operating system 4.0a. Do I want to change this? If so to what?
Registered: 03/21/01
Posts: 3583
Loc: Middletown, DE
Tom, 4.0a (New sounds, new styles, new 4.0 OS). 4.0b (Option to have old/previous SD1 sounds with the new styles and new 4.0 OS) 4.0c (4.0b PLUS more polyphony and smaller issues resolved).