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Vivaldi’s Summer on Commodore-based instruments
The bass (cello) part is performed on a plain breadbin C64. The solo violin and second violin parts are performed on the C=TAR. The viola part is reproduced using floppy drive noise. The Amiga provides drums and a little bit of Kalimba.
I also wrote the software: Qwertuoso (and derivatives) for the C64 and Paulimba for the Amiga. Appropriately, it's all bare-metal programming.
@corlin It's...impressive. I'm going to need more ibuprofen to keep listening