locating the chorus in a MIDI song?

[Aaron Brady]

On Nov 3, 10:20 pm, Joe Strout <j... at strout.net> wrote:
> We've got a need to generate short "samples" of songs that are in MIDI  
> format, to provide a preview function in a web app.  We'd like to do  
> something more clever than just taking the middle 20 seconds (or  
> whatever) of the song -- ideally, we'd like to find the chorus, since  
> that's likely to be the most easily recognized part of the song.
>
> I believe this could be done fairly reliably by looking for patterns  
> in the MIDI file, though I'm sure there are plenty of complications to  
> this simple idea.

Hi Joe, nice to hear from you from earlier discussion.

Would it be applicable to mark one chorus by hand, and the program
finds all the others?