--- In logic-users@yahoogroups.com, Maurits van de Kamp <maurits@...> wrote: > > > I'm running Logic on a G5 dual with a 2408 and I get processor > > noise > > coming through my speakers.It doesn't end up being recorded but is > > really > > annoying to listen to > > for hours at a time.Has anyone heard of this or experienced it > > themselves? > > Any help would be greatly appreciated. > > It's the (in)famous G5 chirps; the power supply is either making > noises itself (with these high-pitched chirps it can convincingly > seem like it's coming from the speakers whereas it's actually the > computer chirping) or magnetically inducing the chirps on a ground > loop making it come out of any analog output in the loop. > > The full story is here: > > http://docs.info.apple.com/article.html?artnum†523 > > And if the above url is mangled by the online forum, copy and paste > the url > below and remove the space between = and 86523: > > http://docs.info.apple.com/article.html?artnum= 86523 > > Maurits. > Phone Apple they will change the PSU free of charge as they did to my G5 2x2 :) Best Cyril