Yamaha CS80

Hey David,

 Any chance you might be able to post an audio file of what the unison sounds like? I 
would love to hear it.

And yes-it's way to hot here in Southern CA!!! My circuits are melting!


Thanks,

Stephen Teller

--- In yamahacs80@yahoogroups.com, "David Rogoff" <david@...> wrote:
>
> Hi all.
> 
> Hope it's cooler where you live than here (southern California)!  
> 
> I have a mystery for everyone.  I just had a CS80 dropped off today
> for a couple of (I hope) simple repairs.  It's SN 13-somethings and in
> pretty good shape and tuning.  However, someone had previously
> installed some kind of unison mod to it.  The current owner was told
> that it used to (many years ago) belong to Frank Zappa (Jobson era???).
> 
> I've opened it up a bit and taken a few pictures.  They're in the
> Photos section of the Yahoo group in album "Unison Mod."  Does anyone
> recognize this and/or know who did it?  It seems to work.  
> 
> When the lower switch is set to "U", the keyboard is in a dynamic
> unison mode.  Hitting one key stacks all 8 voices (sounds amazing!)
> while hitting more keys starts splitting the voices.  Hitting
> additional keys doesn't send new triggers to the EGs, so it's like a
> legato mode.
> 
> When the switch is set to "S" is seems to be in some kind of single
> mode, in which new keys are assigned to upper or lower voice cards.
> The upper switch somehow affects this assignment, but I haven't
> figured out the algorithm yet.
> 
> I haven't lifted the keyboard yet, but I'll post pictures of the
> mystery circuit board soon.
> 
> One thousand Quatloos to whomever can tell me about this thing.
> 
>   David
> 
> p.s. CS80s are not fun to carry around in 95° heat!
>