PDFtoMusic converts music sheets in PDF format into editable scores. Additionally, it can play the music and even sing the lyrics. The software also supports exporting files into various formats like MusicXML, MIDI, Myr, BMP, and WAV.

In the past, your only options were to input scores again completely or use an optical recognition software to convert them, which wasn't always successful. But PDFtoMusic Pro can extract music-related elements from a PDF file in just a few seconds and rebuild the original score. You can then export it in formats like MusicXML, MIDI, Myr (Harmony Assistant files), or even in a digital audio format like WAV or AIFF.
PDFtoMusic Pro also has an embedded module called Virtual Singer, which can sing the vocal parts in your score. This software works with PDF files generated from any software, even discontinued ones, making it a versatile tool for musicians and composers alike.
Overall, if you're looking for a reliable and user-friendly way to modify scores in PDF format, PDFtoMusic Pro is a valuable asset to have in your toolkit.
Version 1.4.2: http://www.myriad-online.com/resources/docs/pdftomusicpro/english/whatsnew.htm