I would actually like to mention a really nice book to help you deal with any doubts or fears you may have.
The Afterlife of Billy Fingers is a brilliant book about William Cohen, who died at the age 62, and how he managed to come back to convey his experiences in the afterlife to his younger sister Anne.
It is a phenomenal piece of work, easy to read and digest.
At the same time he mentions the sound of heaven and refers to 2 Classical pieces:
- Sibelius: The Swan of Tuonela
- Mahler: Chorus Mysticus
If you one day feel like you are missing your heavenly home, sit and listen to these 2 pieces.