Draw a chord progression in a style, rewrite it, hear it in five tunings, and take it to the Song studio.
Play loops the chords. The tuning buttons retune it while it plays.
1.1CItonicC E G2.1DmiipredominantD F A3.1GVdominantG B D4.1CItonicC E G
Reading
Pop: Triads of the key in loops; the subdominant is as welcome as the dominant.
Cadences: perfect authentic into C.
100% of the root moves fall by a fifth, the strongest pull in tonal harmony.
The scale: C major
NotesC D E F G A BSteps in semitones2 2 1 2 2 2 1Interval vector⟨2 5 4 3 6 1⟩Forte name7-35Structure7 modes, 12 transpositions, maximally even, two sizes of every interval, every interval class a different number of times, the same upward and downward
Tuning the tonic chord
A pure third is 386.3 (5:4) cents and a pure fifth 702.0 (3:2). Roughness sums the beating between the partials of the three notes; lower is smoother.