Re: diff music

[Nick Bailey]

On Tuesday 16 December 2008 05:07:33 Mark Polesky wrote:
> CJ Bell wrote:
> > \diff \partA \partB
>
> What an awesome idea! Can anyone figure this one out?
> That would be such a useful tool.
>
> - Mark
>
>
>
>
>
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Done it... well, something like it :) It's hard, but solvable dynamic 
programming problem. Actually, Roger Dannenberg at CM did it years ago, but 
depending on what you think "added", "removed" and "different" mean in music, 
particularly with chords, you might want to tweek it a bit.

Have a look at chapter 3 of Dougie McGilvray's thesis. It's on our old server: 
http://markov.music.gla.ac.uk/CMT_Pages/Publications/Theses/DouglasMcGilvray.pdf
 "Polyphonic 
Matching using DP" for the lowdown. I don't think it'd be that easy to 
rewrite it to get it running on lilypond files, but not impossible either. He 
refers to "score" and "performance", but you could think of the performance 
as another score in this context.

Nick/.