myNNS.app

Nashville Number System · charting engine

v0.5.4

Song

Key

Meter

deg

qual

rhythm

bar

Click a bar to select it, then tap a degree. Symbols layer on top.

Common progressions — click to append as a new section

Prototype scope: full NNS entry — degrees, qualities, diamonds, pushes, marcato/staccato, split bars, beat dots, section structure, and live number↔letter mapping off the key strip. Change the key and every letter re-renders while the numbers stay put — that's the whole point of the system.
v0.5: chord audio now pulls live open-tuning voicings from api.tunin.gs — the complete FretboardGPS library, every key, every diatonic quality plus 7ths. Amber badge = transposed fallback shape (library had no match or offline).
Phase 2: real-time multi-user sync (shared chart, live edits across devices) — backend wiring, built once this entry model feels right.