I understand that part of it, because in Sustain 1 the oscillator voltage is held by the capacitor on the SH card, whereas in Sustain II, the key assign is still connected to the oscillator.
But it seems every one of these synthesisers I've ever worked on and that includes the CS-60, has this problem of oscillator pitch drift when releasing keys when using Sustain 1, some worse than others.
My guess is leakage on the SH card caused by contamination, but I'd like to hear other people's experiences.
If you have a CS-60 or CS-80, select Sustain 1 and set up a long release time, and see if the notes change in pitch during the release cycle.
Lucid.
----- Original Message -----
From: Laurie Curry
To: yamahacs80@yahoogroups.com
Sent: Thursday, May 12, 2011 9:40 PM
Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1
the secret to understanding the sustain switches is this..... When you use sustain 1 , the modulation sources and performance filters are interupted from the oscillator once the key is lifted... you will have a long release, by will not be able to pitch bend that hanging oscillator... so it is in a non controlled state....
-----Original Message-----
From: "lucidsound" <lucidsound@...>
To: <yamahacs80@yahoogroups.com>
Date: 05/12/2011 13:34
Subject: [yamahacs80] Pitch Drop When Using Sustain 1
Has anyone else come across the quirk whereby if using long release times in Sustain Mode 1, the oscillator pitch drops slowly when the notes are released? Switching to Sustain II brings the notes back to the correct pitch.
I figure this is something to do with the Keyboard SH card, and voltages leaking away from the capacitors.
Any suggestions or previous experiences of this problem welcome!
Thanks,
Lucid.
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