I added a pot as master level control but it acts weird no matter how.
Warning it’s getting pretty loud, but it shows what happens when the pot is getting fully opened:
http://www.batchas.com/serge/CGS04-Mixer-issue-pot-out.mp3
I replaced the 100k* resistor with the pot (no matter which value it acts the same. I checked with different pots, changed TL072 etc. Same issue):
http://www.batchas.com/serge/Serge-CGS04-Issue-pot-out.png
I also installed 47pF between pin 1 & 2 of TL072 as recommended on Ken's page (https://www.cgs.synth.net/modules/cgs04_mix.html).
Warning it’s getting pretty loud, but it shows what happens when the pot is getting fully opened:
http://www.batchas.com/serge/CGS04-Mixer-issue-pot-out.mp3
I replaced the 100k* resistor with the pot (no matter which value it acts the same. I checked with different pots, changed TL072 etc. Same issue):
http://www.batchas.com/serge/Serge-CGS04-Issue-pot-out.png
I also installed 47pF between pin 1 & 2 of TL072 as recommended on Ken's page (https://www.cgs.synth.net/modules/cgs04_mix.html).
The circuit is so simple I'm really wondering what I am doing wrong.
Thanks in advance for any help!