On Thu, Mar 02, 2006 at 07:09:35AM +0900, res0u2uc@xxxxxxxxxxx wrote: > On Wed, Mar 01, 2006 at 04:52:33PM -0600, Paul Winkler wrote: > > The only exception I can think of is when there's a > > DC offset to the signal of sufficient voltage to force the > > signal always be positive (or always negative). > > But that would mean something's broken :) > > Not necessarily broken. Class A amplifiers do their work > with sufficient DC offset that the signal never changes > direction. Even so, the music is carried by an AC > *component* which is present, and may be separated out by > using a transformer. Or a highpass filter tuned very low - AKA a capacitor in series. Which almost any modern electronic gear has on its inputs and outputs. -- Paul Winkler http://www.slinkp.com
