just out of curiousity, are you guys talking about fabricating the pcb because of pcb damage? it seems like problems being due to the actual pcb are unlikely. just curious where this is coming from-component failure, or problems with the traces of the board?
--- On Thu, 3/5/09, galaxiesmerge <galaxiesmerge@...> wrote:
From: galaxiesmerge <galaxiesmerge@...>
Subject: [yamahacs80] Replacement KAS board? - Re: Voice allocation ? / YES!!!
To: yamahacs80@yahoogroups.com
Date: Thursday, March 5, 2009, 7:30 AM
I would be very, very interested in paying for a replacement.
I would also be equally interested in a "how-to" video on servicing the CS80 as well. Even though I'm comfortable with electronics, I have ∗never∗ had the need to service my CS80 but I'm feeling more and more nervous as time ticks by ... I've started with review of Old Crow's site and the wonderful bill of materials for the chip replacements. Cheers.
--- In yamahacs80@yahoogro ups.com, "David Rogoff" <david@...> wrote:
>
> Sorry if some attributions got messed up in my in-line notes below.
>
> Anyway, it seems like a few people have worked on replacement KAS
> boards for the CS80. However, it doesn't appear than anyone has gotten
> one to the point of mass production / sales. I'm wondering if those
> of you working on them would like to get together to share ideas and
> maybe get a joint design working and ready to sell to the CS80
> populous. I know there are issues of intellectual property and getting
> paid for design work, but I imagine, in the amazingly polite society
> of CS80 folk, this could be worked out.
>
> We could at least have fun brainstorming what features a KAS
> replacement board would bring:
>
> MIDI in/out
> Disable bad/out-of-tune voices
> Auto (or least least assisted) tuning
> Mono mode - with various key priority
> Unison mode (dynamic?)
> Different key assign modes
> Different glide/gliss curves
>
> A lot of stuff I can think of would also require replacing the TSB and
> TKC board. Basically, you end up replacing all the electronics under
> the keyboard, which would be great, and theoretically not too complex,
> but a lot of design work and rewiring!
>
> Dream away!
>
> David
>
>
> Ernest Meyer wrote:
>
> > Scott
> > Doesn't the CS have, already embedded, a "steal the oldest" logic which
> > integrates with this weird pitch code encoding+LRU?
> > Basically, for what I could understand, in a Sustain-II state, if
> you have
> > all 8 voices playing and have a new note playing, the oldest voice
> playing
> > is stealed by the new note
>
> Is this true? I don't have a CS80 around at the moment, but I could
> swear, at least in Sustain-I mode, that if you are holding eight keys
> down, it ignores any subsequent key presses.
>
>
> >
> > ----- Original Message -----
> > From: The Old Crow
> > Colin f wrote:
> >> You'll find the GX1 KAS schematic here:
> >> http://www.sequenti x.com/gx1/ GX1-KAS.zip
>
> Just looked at this. Maybe I don't want to ever work on one of these
> and will stick with the (relatively) simple CS80 :^)
>
> > I built a CS-KAS based on PICs a while ago. It works, but I did not
> > adopt their strange assign order and instead went with the two popular
> > ones, "steal oldest note" and "steal least used note". I need to finish
> > that thing, it still needs the gliss/porta function to actually work..
> > Never enough time...
>
> Do you have mono and/or unison modes? For mono, you'd want choices of
> high-note priority, low-note, and last note.
>
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