Wed Jun 11 18:41:02 EDT 2014

Capacitors for audio

Class 2 ceramic capacitors might be problematic[1].  I've ran into
this before.  (re-googling: [2]). 

So what kind would be good?

Dave mentions in [1] that "class 1" capacitors (only low-value
e.g. <1nF) are quite good.  NPO, COG.

Also, ceramics are microphonic, so probably not good in the signal

Mylar (polyester film)?

Metal film?  Same thing?

Hmm... not a simple thing apparently.

[1] http://www.eevblog.com/2014/06/07/eevblog-626-ceramic-capacitor-voltage-dependency/
[2] http://quadrevisionspot.blogspot.com/2010/12/what-are-best-capacitors-for-audio.html
[3] http://en.wikipedia.org/wiki/Types_of_capacitor
[4] http://electronics.stackexchange.com/questions/69919/ceramic-vs-film-capacitor-which-one-is-preferred-in-audio-circuits