Don't have right cap, go higher or lower?

[lmacmil]

I'm building Jack Orman's MOSFET boost and I don't have a 47pf cap that goes from input to ground [C2 on the schematic].  I have a 30pf and a 90pf [which happens to be a silver mica cap, I assume that doesn't matter].  Which one should I use and how might it affect the sound, if at all?

Thanks.

[aron]

Either one will work. Go with the 30pf. You probably won't hear the difference either way.

[lmacmil]

Thanks.  I used the 30pf.  Sounds fine.