Rolf R Bakke | C64 Rob Hubbard's "ThunderCats" oscilloscope view @RolfRBakke | Uploaded December 2014 | Updated October 2024, 8 hours ago.
If you want the see just one of the three voices at a time:
Voice 1 : youtube.com/watch?v=HXxLVeD5DoM
Voice 2 : youtube.com/watch?v=QVhx-1r53Xg
Voice 3 : youtube.com/watch?v=9VNdVr6LUsI