Someone requested MIDI and other exports at https://github.com/hacklily/hacklily/issues/2 and I'll try to tackle soon. Hacklily already makes MIDI available (for playback), so it's a matter of actually exposing that.
There are solutions for converting sheet music images to MusicXML/Finale/etc., but I haven't had good results with any of them.
There are solutions for converting sheet music images to MusicXML/Finale/etc., but I haven't had good results with any of them.