When to use electrolytics

[acehobojoe]

I switched the C3 cap on this pedal to a nonpolarized film.. I had it as an electrolytic because I have seen other buffer from FET source caps like that, but is there any reason to use a polarized one ?

http://i.imgur.com/52A8mCb.png

[Joe]

I doubt it matters much - usually the reason for using an electrolytic is due to cost concerns, or needing a large capacitance value in a smaller package.

[greaser_au]

Polarised electrolytic caps are small and cheap,   that's the reason for using them. 

david

EDIT: like Joe said!

[bluebunny]

C7 is another 1uF cap, and that one is shown as non-polarised, so you have to wonder...      I'd go with the film caps for both.  They're not that big.   

[GibsonGM]

There isn't any reason to use a polarized one, no. In fact, NP is the better choice.