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Ecliptic · Prototype 0.5

Scales on the sun's road

Chart scales and modes across a keyboard. Pick the controller under your hands, shift octaves to match it, and the scale is drawn across the keys with the root on the sun. The same figure repeats every octave, like the sun crossing the same twelve signs.

Keyboard
Root
Scale or mode
Note labels
Sharps or flats
Range

Playing in · scale picker

What key is the song in?

Pick the key and Ecliptic lists the scales that fit it, closest to home first. Each one carries its character (somber, eastern, mellow…); hover any scale name here or in the Scale menu for a description. Click a scale to chart it.

Key
Major or minor

Charted scale

Scale

Scale notes · click to color Click a note and every copy of it on the keys takes that color. Click again to clear it.
Key range Show scale notes only between these keys; the rest of the keyboard dims.
From
To
Sound With sound on, click any key to hear it. Play ▲ / ▼ plays the scale one octave from its lowest root in range.
MIDI in Connect a controller and the keys light as you play: in-scale notes in gold, out-of-scale in ember.
Snapshots Six saved charts: keyboard, range, scale, colors and riff. Click a name to bring it back. Click ⤓ to save what is on screen into that slot. Double-click a name to rename it; × empties a slot.
Save as PDF A one-page color chart of exactly what is on the keys now. Prints fine in black and white.

The wheel

Twelve signs, twelve keys

The sun sits on the root. The lit signs are the scale; selected notes keep their colors; a chord draws as a figure across the wheel. In fifths order the scale gathers into one arc, and the neighbouring keys sit beside it.

Click any sign to select that note on the chart. MIDI-held notes ring the sign in white.

Harmony · explore around this scale

Modes, neighbours and chords

Everything here starts from the scale that is charted above: its sister modes, the scales one note away, and the chord on every degree. Clicking any of them changes the chart.

Chord tones Pick a degree, then Triad or 7th: the chord built on that degree lights up on the keys.
Every chord in this scale · click one to light it

Sightings · scale finder

Which scale has these notes?

Tap the notes you are playing, send the notes you have selected, or collect them from MIDI in. Every scale that holds all of them is listed, closest fit first; click one to chart it with your notes lit.

Riff Map · riff generator

Write a riff from this chart

A riff is written from the scale, the key focus as the register, and your selected notes as anchors it starts and ends on. No rhythm: the map is the path, you bring the time. Click a step in the strip to lock it and regenerate the rest.

Style
Length

Observer's notes

What this prototype proves

Every key is stored as a real pitch. Choose the controller under your hands and shift octaves to match it, and Ecliptic charts the scale across exactly the keys you can reach. The PDF is drawn from the same list of keys as the screen.

Ecliptic remembers your last session in this browser: keyboard, range, scale, colors and key range. Snapshots are kept separately.