Ben

Ashley Thanks for considering my problem further. I just listened through to a track watching the screen on the Cambridge player to see if the input show any sign of the signal being dropped. About 3 mins or so into the track I got some screeching in the background or whatever you want to call the interference for a few seconds, yet there was no signal drop showing on the Cambridge Audio.

Larry When you say drop out, do you mean total silence or interference? I posted only yesterday in relation to interference funnily enough experience running by my AE (n) into my CA 840 CD player. I called tech support at Apple today and they told me to do a pram reset !

Actually normally the music starts to stream fine and sometimes it is not until midway through the song that the screech or distortion of the music happens. Remember if I plug my laptop direct to the dac all is fine. Best Ben

Actually normally the music starts to stream fine and sometimes it is not until midway through the song that the screech or distortion of the music happens. Remember if I plug my laptop direct to the dac all is fine. Best Ben

Thanks Ash. You state that there could be a clock mismatch. What should I do to resolve this mismatch? Buy another dac? Any recommendations under £1000. Or could I used the USB output from the airport express and run it into a USB to toslink convertor that you can buy? I have an Airport Extreme Time Capsule by the way on which I already store my music. Or should I buy the Apple TV again and hope that it works? Do you know about the PS Audio Digital Lens. Sorry for all my questions. Thanks Ben

Thanks Ashley. Actually, it was the Apple TV I tried that dropped off the devices list in Itunes. Apparently this is a very common problem with device and makes me nervous about trying it again. Funny thing, it did not produce any screeching effect in the two week period I tried it. Furthermore I have tried plugging in my macbook to the dac and again no problems. It is only with AE which leads me to believe that the optical signal emitted by the AE is very poor quality. Do you think something like a squeezbox duet would be any better?

I currently run the following set up: Apple Time Capsule on which all my Apple Lossless Music Files are stored. MacBook with only minimal music stored. Airport Express (n not g version) 840 Cambridge Audio CD Player I stream my music through to the Airport Express which connects to the 840 player digital optical input. Recently, I experience occasional distortion or screeching like interference when I play my music for about 10 secs that then goes away. I used to get this in fact even when I stored all my music files on an external hard drive that I connect via firewire to my macbook. Does anybody have any ideas as to the possible cause of and solution to the problem? I had read on some forums that it comes from itunes vers 8 itself. Is this true? Would using a 40GB Apple TV as a streamer for Airtunes in place of the Airport Express solve the problem? I have heard of people having problems with Apple TV dropping off the device list on their computers? Finally I have also read that use a reclocking device improves jitter greatly on the Airport Express? I have seen a reference to the PS Audio Digital Lens? Is there something like this available in the UK and is it a worthwhile purchase? Thanks Benjamin