Sequencing

I'd like to experiment with a little bit of sequencing in Tyrannosaurus Mouse. I mean sequencing like it's 1972, not 1986.

There are some rather amazing sounding free VST synthesizers out there. Glen Stegner has a MiniMoog and an Arp2600 emulator. I have to admit, they sound very good.
The Wikipedia article on Bohemian Rhapsody has a pretty detailed analysis of its structure. Yes' Roundabout does not.