PeppyMeter and moOde

[Nutul]

Of course - without peppy - moode is able to play that kind of files. I've tried to study a bit the problem and I've found that the issue only occurs with purchased itunes files and not with any m4a itunes files that i've imported from my cd roms into itunes. And if I convert m4a/aac itunes files into m4a files moode is able to play them with no errors.

Reading better,

is moOde able to play the very same files IF you play them WITHOUT PeppyMeters? Or are you just mean ("that kind of files") that moOde can usually play .m4a files?
According to what Francesco is saying, the stream is kind of doubled: one copy is for MPD to play, and the other is for PeppyMeters to read and display.
Apart from timing conflicts, the only thing that comes to mind is some sort of DRM on the files, which Alsa observes, and limits MPD in its playback...

It could also be interesting to examine at byte-level the original file and the converted one... just for curiosity.