I've been using Poweramp for a while now. Previously I used it with my Galaxy S i9000, where everything worked fine. Recently I upgraded to a Nexus 5, and I'm experiencing audio glitches during playback. It happens randomly every 4 or so songs, it's difficult to describe the sound but something weird defiantly happens. It doesn't matter which song I play, and sometimes it can be 5-6 songs with no glitches at all. They aren't longer then half a second, but still ruining the listening experience. As far as I can tell it only happens with Poweramp. I've just tried listening to roughly 2 hours with Google Play Music, and no glitches so far. As I said, I'm using a Nexus 5, currently running newest version of SlimKat (weekly) with ElementalX Kernel. I've also tried it with Linaro and Code Blue kernel on SlimKat. Likewise with ParanoidAndroid and Linaro/ElementalX kernel. Can't remember anything about stock Android, since I rooted pretty quickly.