MS-20 (LM-13700 version),Polivoks or EMS VCF on veroboard?

[Sebo]

AC mixer means that can only accept AC signals, in practice the coupling is done by a high pass filter with a sub sonic cutoff frequency, so in general an AC mixer is considered capable of mix audio signals but not CV signals. Also an AC mixer will kill any DC that try to come in.
A DC mixer is suitable for any signal, audio and CV, and it will pass any DC.

I'm not sure to understand your last question, but if you will always use that path, your VCA could be AC or DC, don't really matters.

[isak]

Understud, thank you for that!
I'll build the mixer and let you and the guys know if it worked for the Jorg ms20.

cheers.

[isak]

Hi Sebo.

I build the mixer and added 10uF Tantalums to all inputs like you adviced me.
The + side to the input, the - side to the resistors.
It's sound better now
You where right about the vol input!
I lower the vol input in the mixer and the square and saw sound much much better.

One thing is still bothering me, the self osc is comming to soon when turning the reso pot CW, is there any way to make it start in about 3 o'clock?

Thanks Sebo.
Isak E.

[Sebo]

Hi isak:
Great you get it sounding right!!!
I'm on vacation now, far away from home, I have to see the circuit to give you an answer. When I get back I'll check it out.
Cheers.

[isak]

Hi Sebo.

enjoy your vacation man.
See you soon