{"tonagi":{"app":"material curado","kind":"sequence","schema":1,"createdAt":"2026-10-04T09:00:00Z"},"content":{"id":"5D72C963-1BA8-5945-88F2-F0A42E7C274D","steps":[{"note":"Start with the A: match it to the app (your A setting, 442 Hz by default). The app sounds each string an octave higher, so it can be heard: tune at the octave.","rest":false,"notes":[45],"tuningId":"pitagorico","tonicIndex":9,"durationUnit":"free","durationValue":1},{"note":"Play both strings and tune the E until the fourth stops wobbling.","rest":false,"notes":[40,45],"tuningId":"pitagorico","tonicIndex":9,"durationUnit":"free","durationValue":1},{"note":"Play both strings and tune the D until the fourth stops wobbling.","rest":false,"notes":[45,50],"tuningId":"pitagorico","tonicIndex":9,"durationUnit":"free","durationValue":1},{"note":"Play both strings and tune the G until the fourth stops wobbling.","rest":false,"notes":[50,55],"tuningId":"pitagorico","tonicIndex":9,"durationUnit":"free","durationValue":1},{"rest":false,"notes":[40],"tuningId":"pitagorico","tonicIndex":9,"durationUnit":"free","durationValue":1},{"rest":false,"notes":[50],"tuningId":"pitagorico","tonicIndex":9,"durationUnit":"free","durationValue":1},{"note":"Single strings to check on the tuner. Pythagorean on A = the pure-fifth tuning of the open strings.","rest":false,"notes":[55],"tuningId":"pitagorico","tonicIndex":9,"durationUnit":"free","durationValue":1}],"title":"Double bass · Open strings — pure fourths","embeddedTunings":[]}}