Hmmm, I think I went off a little half set up on this.
The EG3 signal is software inserted into VCF cutoff. So you would have to accept setting EG3_INT to something above 0 (such as 1-15) and then picking up the AC signal on pin 1 of IC7 (NJM2902). You would best do this by decoupling the signal using a small value cap (<100pF) and using protection diodes of course. That would pick up the spike from the EG3 signal while ignoring the DC VCF level.
Mike
From:
7yash <josh.nursing@...>
To: korgpolyex@yahoogroups.com
Sent: Wednesday, August 3, 2011 8:53 PM
Subject: [korgpolyex] Re: Tapping into the Key On state.
To: korgpolyex@yahoogroups.com
Sent: Wednesday, August 3, 2011 8:53 PM
Subject: [korgpolyex] Re: Tapping into the Key On state.
Mike, on which IC and pin can I get the EG3 output?
--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
> ANother way would be to intercept the EG3 envelope output. And you could use a simple schottky (74C14) to provide the high low signal. Two diodes to protect the input.
>
> Then you can set EG3 timing to what ever you want. Set multi trigger and you're done.
>