Static screen-caps of the Silverlight interactive content

Frequency, and octaves

The simplest frequency ratio is 1:2 and it is the ratio between a tone and the tone an octave higher.

The tone helix and the tone clock

Here is the same frequency spectrum shown above, except this time it has been coiled into a 3D helix of repeating octaves where each octave is a clock of twelve discrete tones.

Here's a sequence of frames as the tone helix flattens down into a single, representative, octave known as the tone clock.

Scales and keyboard

This content is about auditioning scales. In the Silverlight version, the keyboard is interactive: you can click or tap to play tones, or use your computer keyboard to play tones and chords.