Hi David
You should look at a previous step than the SH, which is KAS
itself: basically you should look at the processing of pitch CV as
serial and monophonic; the polyphony is helped by the gates straight
into the SH, while the KAS internally makes possible to distinguish
between the busy and the avaliable voices; this lets you have polyphony
and mono unison according to the avaliable notes while in S-2...
truncating notes...well it is a myth: you actually don't truncate
anything but if you set long release for the envelope and at the same
time you have ∗all∗ the gates in the SH open, you will definitely
"hear" the monophonic allocation of the pitch, because the envelopes
are still running...
Basic explaination but I guess it's what you need.
M
----Messaggio originale----
Da:
david@...Data: 7-feb-
2011 7.07 AM
A: <
yamahacs80@yahoogroups.com>
Ogg: Re: [yamahacs80]
Unique keyboard features
>
>
>
>
> I just put in a couple of
comments there, including about the (as far
> as I know) unique
Sustain I/II modes. Does anyone know of any other
> keyboards, besides
the CS50/60/80 that have this ability to have a
> long release time
but have new notes cut off old ones? I think it's an
> amazing feature
of the CS80 and have never seen it anywhere else.
>
I realized a little
bit ago that I didn't know how the CS80 did the
Sustain I/II trick.
So, I've been looking through the schematics - and
I'm still
confused! I only see the Sus I/II switch going to the SH
board. This
explains the Sus I/II behavior of glide continuing after
letting go of
keys in Sus I but freezing pitch in the middle of a glide
in Sus II
(or is it the other way around??). However, it doesn't
explain how
notes get cut off. I thought I was onto something, but it
was just
the mixing of the Sustain slider on the left-hand panel (PN3)
with the
programed VCA and VCF release voltage going to the M cards.
This
circuit is on the Sub board. Where did I get lost (which is easy
to
do on the giant schematic)? I don't see the Sus I/II switch
connecting anywhere else.
By the way, I wish the CS80 didn't freeze
the glide in Sus II mode. I
think I might temporarily disconnect that
wire to hear how it sounds
with glides finishing in that mode.
David
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