Hi. I'm using the latest IOS8.4 on an iPhone 5S. Despite having my music and audio book apps set to 100% volume, I often find that the actual volume is very low. If I then use SIRI, for example, the volume level of my music etc is suddenly perceptably higher. Additionally, if I triple tapp the Home button, to unload Voiceover, my music plays at full volume. Has anyone experienced issues like this? Perhaps there is an issue with the audio ducking features of Voiceover, that has the ducking active when it should not be? Most of the time, Voiceover is way louder than my music or audio book content. Any thoughts?