{"tonagi":{"app":"material curado","kind":"sequence","schema":1,"createdAt":"2026-09-26T09:00:00Z"},"content":{"id":"784D3B40-DCC8-544F-835D-34352580D55C","steps":[{"note":"Dominant seventh, equal. Tense and busy.","rest":false,"notes":[48,52,55,58],"tuningId":"igual","tonicIndex":0,"durationUnit":"free","durationValue":1},{"note":"Just on C: the triad calms, the B♭ (16/9) still rubs.","rest":false,"notes":[48,52,55,58],"tuningId":"justo","tonicIndex":0,"durationUnit":"free","durationValue":1},{"note":"Harmonic 7th: B♭ 31¢ lower (7/4). The chord melts into one sound.","rest":false,"notes":[48,52,55,58],"tuningId":"tg-harmonic7-c","tonicIndex":0,"durationUnit":"free","durationValue":1},{"rest":true,"notes":[],"durationUnit":"free","durationValue":1},{"note":"Only C and B♭, equal: you can hear them fight.","rest":false,"notes":[48,58],"tuningId":"igual","tonicIndex":0,"durationUnit":"free","durationValue":1},{"note":"7/4: they blend. Sing the B♭ low enough to find this.","rest":false,"notes":[48,58],"tuningId":"tg-harmonic7-c","tonicIndex":0,"durationUnit":"free","durationValue":1}],"title":"Harmonic seventh — the barbershop chord","embeddedTunings":[{"id":"tg-harmonic7-c","title":"Harmonic 7th (7/4)","offsets":[0,11.731,3.91,15.641,-13.686,-1.955,-9.776,1.955,13.686,-15.641,-31.174,-11.731]}]}}