What's the difference between Theater and Music modes in HTC BoomSound with Dolby Audio?
You can toggle between Music mode or Theater mode while you listen to audio using the phone's front-facing speakers. Music mode optimizes the sound quality for songs and music tracks. Theater mode works best for movies or games with multi-channel audio as it enhances sound effects. When you've plugged in a headset, you can turn HTC BoomSound™ with Dolby Audio™ on or off.