Inconsistent volume after iOS7 upgrade HELP!

I DJ in a high-capacity club in Manhattan 4 nights a week and use DJay for the majority of my shifts because it’s reliable and convenient. I recently upgraded to iOS7, and ever since I made the upgrade, the playback volume dips and then increases every 45 seconds or so. It’s not noticeable on my home system really, but on a system that fills up a 200-cap it’s pretty problematic.

Is this a software or a firmware issue? (In other words, do I need to refer this question to Apple, or is it a compatibility problem with DJay and the new platform, which I find to be frustrating in general for running pro Audio?)