A music theory tool for beginner musicians, Circle of Fifths, Opus 1 is a pocket reference for analyzing, transposing, and composing music. This app focuses on major and relative minor scales and chord progressions. For a more advanced version of Circle of Fifths, check out our Circle of Fifths, Opus 2 edition. Opus 2 explores musical modes often used in jazz and a variety of other musical styles. FEATURES • Interactive circle: rotate it or tap on a key to see its scale and circle chord progression. • Play scales and chords out loud by tapping on the staves. • Tap on individual chords to explore chord patterns. • Includes both chord name and roman numeral notation. • Choose from treble, bass, or alto clef. Circle of Fifths, Opus 1 was created by Lucius Kwok and Agnes Chan. Made in NYC.