I use my iPod touch as a tone generator. "Audio Tool" by performance audio.

I didn't know there were different AAC formats.... I feel like this might get confusing! Which of those (or which other one) does Apple use? That's all I'm worried about!

Any word on AAC playback?

Ok, here's a good one .

[quote user="Daniel"] What's the difference between Beosound 5 and Beosound 5 Encore ? [/quote] NOOOOO! Trip is probably going to explode!!

Sorry Michael, I was busy and just wanted to get the ball rolling for you. A capacitor issue could strike anywhere and anytime considering your equipment's age. Me and a few others would recommend that you do [or have someone else do] a complete re-cap of your stack. Should also prevent further odd faults down the road. I would still follow Søren's

Capacitor issue in the preamp section?

Happy Birthday Keith!! Thank you for everything you do behind the scenes

Are you running any high current/high wattage appliances on the same circuit? There are instances of where things like a microwave have caused similar symptoms.

Well done Egoh! I will have to take care of this when I get back into my 4500 system!