Sd-1 operation system

I have operating system 4.0a on my Sd-1. Should I upgrade to 4.0b or 4.0c. If so, I think the option is to upgrade with or without upgrading the sounds. What is the recommendation? Do I do 4.0c with 4.0b sounds or what?

Thanks

Tom

Tom,
I'm pretty sure 4.0 has the new sounds.
Also, I think I have the Tyros styles converted. I'll check in the morning.
DonM

Here is the breakdown...

4.0a Implemented new sounds and revamped the OS.

4.0b Implemented the option to have the new 4.0 sounds or maintain the previous sounds BUT get the new revamped OS.

4.0c (4.0B above plus some new OS features).

Hope this helps.

Thanks,

AJ