OBERHEIM SYNTH

--- In oberheim@yahoogroups.com, "synthy55" <synthy55@...> wrote:
>
> 
> recently picked up an ob-sx, it has a switch on the back to flip 
> between banks of preset patches, but nothing happens when you flip 
the 
> switch, maybe you have to press a button as well?, i don't have a 
> manual, anyone know how to do it?
>

I'm not completely sure, but I think the bank select switch is there 
for an _optional_ EPROM containing more patches.  If you look inside 
the OB-SX, you'll probably see an empty EPROM socket somewhere on the 
main circuit board.