Wikipedia:PlayScore

PlayScore 2 is a sight-playing, music OCR and scorewriter program, developed, published and distributed by Organum Consulting based in Hinksey Hill Farm, Oxford (UK).

History
PlayScore originally appeared as PlayScore Lite and PlayScore Pro on Android and iOS in 2016. It could play single pages of music, and export them as MIDI and MusicXML. PlayScore 2 was released for iOS in January 2019 and in December 2020 for Android. It is a free download with in-app subscriptions.

Software
PlayScore's focus is on playing music based on a photo or scan of a musical score, at a tempo and instrumentation of the user's choosing. To do this it performs optical character recognition and converts it into a digital musical score that can be stored as a playscore file (a zip file containing the source image, and the MIDI and MusicXML result), or exported as MIDI or MusicXML to music engraving programs such as Sibelius, Finale, MuseScore and Dorico. PlayScore is the first OMR product to support tremolo notation with several separate tremolo idioms what are widely used as shorthand in scores for repeating figures.

Technology
PlayScore is based on ReadScoreLib (RSL), which packages up the OMR engine Organum Recognition Technology (ORT) with local language interfaces for PC, Mac, iOS and Android. RSL can be licensed through Organum Ltd.

RSL derives some aspects of its design from compiler technology. RSL treats notation recognition as a problem in syntax analysis and applies an implicit grammar to source images to generate a parse tree. This leads to substantial advantage in recognition speed compared to other approaches.

Reception
PlayScore 2 is mainly aimed at students and amateur musicians who want to learn music and improve their sight-reading.