ScanScore Music Scanning App and Software ScanScore is a system that allows you to use your smartphone, tablet or a conventional scanner to scan your sheet music and have it played back to you. For scanning, you can use a smartphone, a tablet or a conventional scanner. I tried Scanscore that is a paid software for windows 10 and it allows you to scan any sheet music and make changes on it. Which one is best is really an 'it depends' type of answer.
You then need to Import this file into a Notation-type software to convert the Score to Midi and Export again from that application, or use a converter application to convert it directly. Special 'Academic' pricing available for schools & churches. PhotoScore & NotateMe Ultimate 8 is the full-featured version of the PhotoScore & NotateMe Lite scanning software for Sibelius. ScanScore may not be for every casual guitar player, but serious ones and teachers can find it really useful. For this feature you need ScanScore Melody, Ensemble or Professional. Listening, transposing and arranging a piece is now possible without tedious hours of copying note by note.
(To be entirely honest, I wouldn’t recommend melody, just because it can only play one line at a time.