You could use Renoise. It has a lua api [1]. There are some examples of using midi specifically [2]. [1] https://files.renoise.com/xrnx/documentation/Renoise

You could use Renoise. It has a lua api [1]. There are some examples of using midi specifically [2]. [1] https://files.renoise.com/xrnx/documentation/Renoise.Song.API.lua.html https://files.renoise.com/xrnx/documentation/Renoise.Song.AP... [2] http://neurogami.com/blog/neurogami-using-lua-to-process-midi-messages-in-renoise.html http://neurogami.com/blog/neurogami-using-lua-to-process-mid...