For midi you can try my packages: temporal-music-notation and temporal-music-notation-demo (and maybe temporal-music-notation-western). 
It looks like Haskore but different inside. It tries to be clear, minimal, more efficient and documented (as far as my english goes though).

Anton


2013/7/10 Mark Lentczner <mark.lentczner@gmail.com>
I'm a little lost in the bewildering array of music packages for Haskell, and need some help.

I'm looking to recreate one of my algorithmic music compositions from the 1980s. I can easily code the logic in Haskell.

I'm looking for a the right set of packages and SW so that I can:
a) generate short sequences and play them immediately, preferrably in ghci,
-- but 'runHaskell Foo.hs | barPlayer' would be acceptable
2) generate MIDI files

I'm on OS X.

So far what I've found is: Haskore, the midi package, and the jack package - and then I'd need some MIDI software synth for the Mac, and Jack based patcher.... Or perhaps I want SuperCollider, and the Haskell bindings - but that seems rather low level for my needs here (I don't really need to patch together my instruments, and I don't want to have re-write the whole timing framework from scratch.)

So - What's a quick easy path here?

- Mark


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