spyat ustalyie igrushki

Dorian, Phrygian, Lydian and other modes with characteristic tones

Enharmonic chords: C# = Db, D# = Eb, F# = Gb — same pitch, different spelling

Chord library for guitar, ukulele, bass and banjo — 600+ chords

Key signatures, relative and neighbouring keys, and their diatonic chords