DIY audio tester Question

[lerxst88]

for the DIY audi tester can i use any capacitor or does it need to be a 0.1uF?

thanks

[ayayay!]

Is this the same as an Audio Probe?  I think you can use a .22 if that's all you have handy. 

[John Lyons]

Any cap will work but .1uf is a good choise since it passes most frequencies without cutting bass.
Anything higher will be fine as well.

john

[petemoore]

  You need it there to block DC while letting the relevant AC signals through relatively unattenuated, If electrolytic, make or use a non-polarized cap.