For musicians, educators, and composers, the portable document format (PDF) is the universal standard for sharing sheet music. It is reliable, consistent, and prints perfectly. However, it is fundamentally "dead" data—a picture of music rather than the music itself. You cannot change the key, fix a wrong note, or extract a part from a PDF easily.
: PhotoScore provided more accurate results for complex scores compared to MuseScore's OMR, especially in handling intricate notations and multi-staff scores.