WHAT THE DIFFERENCE BETWEEN 4.0a AND 4.0b?????????????????????

Dan... check out "4.0b News" at the Ketron home page:
http://www.ketron.it/home.htm

they not say between 4a and 4b

you can read on ketron web site but i copied for you )

Update 4.0 b

- Optimized the voice reserve for the Right hand.
- Improved the Harmony function on Folk 1 and Folk 2 modes.
- Corrected the Lyric operation when Midi file is played from Floppy Disk.
- Fixed the holding notes problem when shifting from 1 Touch to Program.
- Optimized the Pitch Bend functioning on Vocalizer

oh!! scuse me !!
In the french version of the NEWS there are'nt !!