I am having to constantly adjust volume when switching between my STB and aTV4. And in particular, the Apple Music on the aTV4 is super loud. But even between other apps it is all over the place. One of the frustrating aspects of the aTV4. Never had an issue like this with my aTV3. Of course, I didn't have Apple Music on the aTV3 and that is the main culprit. The other variations are minor comparatively, which is probably why I did not have this issue with the aTV3.