Scales

Where music theory comes from — sound, the harmonic series, building a scale, and the vocabulary that makes it all make sense.

An interactive tetrachord explorer that lets you pick lower and upper tetrachords, hear the resulting scale, rotate through modes, and stack diatonic harmony. 65 scales from pentatonic to bebop.

This descending chord progression is in thousands of songs — but it uses two different scales depending on direction. A scale is a living thing.

A descending baseline over a minor chord appears in thousands of songs. But that little wrinkle at the end means you can't use a single scale.

Understanding the mathematical foundations of audio compression: how logarithms relate to dynamic range and decibel measurements in audio engineering.