Not sure how you soft reset?
I'm one of the many that has a phone that won't shutdown, so I can't just switch it off and on again if that is what you mean?
Hard reset may be worth the pain in the longer run I guess, but I'm rarely in the position to have enough time to restore all my contacts, apps etc. Maybe I'll find a day over the bank holiday weekend to reset and reinstall everything, few people seem to suggest that has cured the shutdown issue for them too.
The music was a song, girl singing... not just a ringtone or notification noise, the only music stored on the device is whatever HTC put on it, was just in my pocket first time it happened, 2nd time on table