Note: Here I only show the complete connection of accordion button C.
Each gate (ins 5, 6, 12, 13) has a 22K pulldown resistor to ground.
The are 2 groups ( groupMinor IC1 to IC3) and group7th IC4 to IC6)
Pressing accordion button C sends +5V to SW pin 4 of IC1 and when I press Minor foot switch +5V are send to all gates of IC1 to IC3
Result: I get a chorus of all switches on from IC1 to IC3, because all 12 gates (of IC1 to IC3) are activated via foot switch. Yet, I only wanted to have C and a# activated via the accordion button C and Minor foot switch.
What am I doing wrong?