Powerful editor on poor-quality scores

• Focus on poor-quality scores
• Detection of tablatures
• Support for 1-line percussion staves, for merged grand staff
• Support for cross heads, implicit tuplets, non measure-long whole rests
• Ability to manually edit any Inter instance
• Ability to insert compound notes, key signature cancel
• Ability to guide voice and time slot for chords
• Ability to limit book processing on selected sheets
• Handbook hosted on GitHub pages