There are emulators for Commodore 64, some even online.
They had a BASIC interpreter, and making sounds was very simple.
Here is a quick guide:
When I was 9 years old, I wanted to make video games. In one weekend I learned how to plot my own sprites, and how to make some obnoxious sounds.
I think some of the Emulators will do the old PET and VIC 20 as well.
CSS64 will dump the sessions sound or video into a OOG file IIRC.