Answer:
What is yours but only used by others?
I can be as thin as a picture frame but my insides have many things you can see.
It is a symphony of noise, It can produce both grief and joys, It is inspiring and grand, Made by a person or a band.
Other terms for this handy device include doohicky, doo-dad, and whatchyamacallit.
What freezes after it is heated up?
According to the music industry, you can count on a midnight train and the devil to turn up here.