stevem Messages: 4733 Registered: June 2004 Location: NY
Senior Member
Also what that audio builder you bumped into probibly was tyring to relay is this.
Every time a audio signal passes thru a cap its phase will be changed degree wise some what, and this effect will add up as more caps are used in the signal chain.
If this added phase change gets to the point where it gets close to or tops 180 degrees the circut will oscilate, but well before that point the original tone will be shifted also.
Some caps are much better than others at not shifting the phase too much.