Obviously this would be a lot of work, and there's a rabbit hole to fall into here. But you seem to be moving in this direction, so I thought I might as well drop a few useful resources.

• Genesis:Audio_Chip_Notes - busy flag examples
• Genesis:Audio_Output_Comparison - recordings from many models
• MDFourier for audio analysis; also includes recordings from a lot of models
  • this page gives details on the differences measured between different Genesis models