Credits
Chopin, Prelude in E minor, Op. 28 No. 4
Typeset by Magnus Lewis-Smith for the Mutopia Project from the Peters edition of 1879, placed in the public domain by the typesetter. Changes for StudyPiano: spelling and layout.
Bach, Two-Part Invention No. 2 in C minor, BWV 773
Mutopia Project, typeset by Allen Garvin from the Bach-Gesellschaft edition; public domain.
Bach, Two-Part Invention No. 6 in E major, BWV 777
Mutopia Project, typeset by Jeff Covey, licensed under Creative Commons Attribution-ShareAlike 3.0. StudyPiano's engraving of this piece is shared under the same licence.
Piano sound
Salamander Grand Piano V3 by Alexander Holm, licensed under Creative Commons Attribution 3.0.
Listening
The note model that follows your playing is based on the high-resolution piano transcription work of Qiuqiang Kong and colleagues at ByteDance, converted to run on the iPad.
Technique book
The Level 7 scales, chords and arpeggios are generated by rule for StudyPiano. They are not copied from any book.