For the past 7+ years I have used an Airport Express and AirPlay (formerly AirTunes) connected to my receiver via S/PDIF. My first receiver was an el cheapo Sony 5.1 home theater in-a-box, and (ironically) it received the Airplay signal without issue. 3 years ago I upgraded my speakers to a nice stereo setup, and upgraded my receiver to match; a Harman HK-3490. All was well except for one minor problem: when skipping (or pausing) a song manually, more often than not my speakers would pop. Sometimes it was a faint pop, but sometimes it was startlingly loud, enough to concern me with the possibility my speakers might be damaged. Given there were no other problems, and that I don't often skip songs, I put up with this behavior until recently (note, however, that I did narrow down the problem as either a fault in the AirPlay software or the receiver's DAC). Last week I ordered a Yamaha RX-V475, thinking that built-in AirPlay compatibility would resolve the pop when changing songs. I was right - though unfortunately I am now contending with a new and far worse scourge: clicks and pops during playback.
These three threads on the Apple forum confirm I am not the only one with this issue:
In my efforts to eliminate the problem, I have again narrowed down the fault to either a) AirPlay software, b) the receiver's DAC, or c) EMI
I have narrowed it down to these possibilities using the following methods. Please let me know if there is something I haven't thought of:
Edited by LostArk - 6/24/14 at 10:04pm