Switching polarised capacitors in a guitar effects pedal
You can leave the unconnected caps floating, no problem.
I'm surprised the design shows the cap's &quot;+&quot; lead facing the input..
The guitar input is biased around 0V...
The base of the transistor is biased to about +1.2V...
...So I would think the caps should be facing the other way.
1.2V is a small enough voltage it's not going to hurt the caps even if reverse biased but still, may as well flip them.
Curious to hear if the different caps make any audible difference. Let us know!