ClefSnapSheet music guides
Practical help with scanning printed music and working with the files.
How to photograph sheet music for a clean scan
A music reader can only read what it can see. A few seconds spent on the photo saves far more time correcting bars afterwards.
MusicXML vs MIDI: which one do you need?
Both can carry the notes of a piece, but they describe different things. MusicXML describes the page. MIDI describes the performance.