Korg Poly800/EX800 Users

Here's the pinout:

KORG NJM2069

Pin#	Function

1	Audio In GND (GND)
2	Mixer Signal 1 Level CV In
3	Mixer Signal 2 Level CV In
4	VCF Resonance CV In
5	VCF 12dB/oct Audio Out
6	VCF 24dB/oct Audio Out
7	VCA Signal In
8	VCA Level CV Log In
9	VCA Level CV Lin In
10	VCA Signal Out
11	Vss (GND)
12	-Vee
13	VCF Cutoff CV Lin In
14	VCF Cutoff CV Log In
15	VCF cap C4
16	VCF cap C3
17	VCF cap C2
18	VCF cap C1
19	VCF Ext Audio In
20	Mixer Signal 2 In
21	Mixer Signal 1 In
22	+Vcc


Chip has separate
*VCA with in,out and lin&log CV ins, 
*VC Mixer with two audio inputs, two CV ins for each input level
control, it's output is
 hardwired to vcf audio in (no ext pin here), separate gnd for input
signal
*VCF with separate ext audio input (in addition to hardwired input from
vc mixer),
output, lin&log cv ins, four pins for integrating capacitors, vc
resonance with
pin for res cv

This is almost half of synt-chip type just like old CEM chips, but
sounds much
fatter IMHO. Short look at pins 5/6 reveals easy mod for poly800 to get
2/4 pole
filter... Poly800 misuses it's vca for adding 3rd vc audio channel to
the mix
as 'real' vca control is performed digitally inside osc chip driven by
soft
envelopes. 




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marjan


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