Here's the pinout:
KORG NJM2069
Pin#Function
1Audio In GND (GND)
2Mixer Signal 1 Level CV In
3Mixer Signal 2 Level CV In
4VCF Resonance CV In
5VCF 12dB/oct Audio Out
6VCF 24dB/oct Audio Out
7VCA Signal In
8VCA Level CV Log In
9VCA Level CV Lin In
10VCA Signal Out
11Vss (GND)
12-Vee
13VCF Cutoff CV Lin In
14VCF Cutoff CV Log In
15VCF cap C4
16VCF cap C3
17VCF cap C2
18VCF cap C1
19VCF Ext Audio In
20Mixer Signal 2 In
21Mixer 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.
---
marjan
me : Marjan Urekar
e-mail:
urekar.m@...s-diy :
http://surf.to/marjansystemsmusic :
http://go.to/forcemajeure