Tension Journey
Pick an emotional tension arc; a transparent engine searches harmony with Chew's Spiral Array so the music's measured tonal tension tracks that exact curve — every chord chosen for a numeric reason.
0:00
Target arc shape (keys 1–5)
Key
C major
↑ / ↓ transpose by fifths · m toggle mode · p perturb
Tempo (sec / chord)
2.0s
← slower · → faster
Length
4.5 min · 110 chords
[ shorter · ] longer · space play/pause