I think Death's reaction to it is one of the saddest thing I ever read. "WILL I BE ... AM I A GOOD GRANDFATHER?" Please hand me the tissues, I'm bawling my eyes out. 
If you're ever confused about music references and such, L-Space and especially The Annotated Pratchett File is a great resource. Sadly the APF stopped updating after "Going Postal" - not sure why.
On the other hand, L-Space wiki is also a handy resource, as is Reddit Discworld. Here's the link to at least one Soul Music discussion there: Would anyone like to contextualize Soul Music for me?
Enjoy!
If you're ever confused about music references and such, L-Space and especially The Annotated Pratchett File is a great resource. Sadly the APF stopped updating after "Going Postal" - not sure why.
On the other hand, L-Space wiki is also a handy resource, as is Reddit Discworld. Here's the link to at least one Soul Music discussion there: Would anyone like to contextualize Soul Music for me?
Enjoy!