[LAU] hydrogen to sheet music?

[renato]

Hi, I have a bunch of hydrogen patterns/songs (that use non-standard
drumkits) that I'd like to export to sheet music (actually exporting to
lilypond would be preferred, so I can later embed the code in emacs'
org-mode). What workflow would you suggest? 

I'd be okay with "a little" of python - i.e. if there was a module with
some good docs/tutorials that can import midi and export lilypond... I
*think* music21 and mingus can do this but I'm wondering, before I
invest some hours in this, if there are faster ways. 

Maybe Rosegarden (for example) can do this?

cheers,
renato
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