Tap to sound. Two fingers = two notes. The outline is the reference — everything else is measured from it. The same intervals sit in the same directions in every key.
A key has exactly six neighbours. Turn the arrows on and look: six arrows out of the highlighted key, and every one of them lands on a key.
Those six arrows are only three intervals, each in both directions — a whole tone, a fourth and a fifth:
And the six are half of the twelve. Every note belongs to one of two sets of six; the other set is everything the first one leaves out. Fill in the notes you skipped and the twelve are complete.
That is the whole figure: one sound at the centre, six directions out of it, twelve named sounds around, split two ways of six. The same figure in every key, because the geometry never changes — only the names do.
Tap a raga below and its seven notes light up on the board — in every octave, wherever they fall.
All 72 are generated by rule in the browser: two madhyamas × six (Ri,Ga) pairs × six (Dha,Ni) pairs. The chakra names are ordinal mnemonics — Bāṇa is the fifth chakra because Manmatha has five arrows, Disi is the tenth because there are ten directions. Nothing here is a pasted table.
Here: a playable board, a drone, three labelling views over one geometry, the six
directions, and 72 scales generated by rule.
Not here yet: notation view, microphone, ornament, rhythm, lessons past the first.
Pitches are computed in cents relative to a reference, so notes between the
twelve are reachable — this page just has no interface for them yet.