Muted

muted.io turns music theory into a broad shelf of visual references and browser tools. The standout cheat sheet gathers a chosen key's scales, intervals, signatures, and diatonic chords in one place, while the wider collection ranges from fretboards and tuners to beat-making and ear practice.

What is Muted?

The home page is less a lesson plan than a generously overstuffed pegboard: major and minor scales, modes, time signatures, chord finders, instrument diagrams, tuners, and small music-making utilities all hang within reach. The theory cheat sheet is the best first stop. Pick a root and major or minor, and the page assembles the surrounding scale formulas, relative key, intervals, key signature, chord families, and circle-of-fifths context. From there, the collection branches into piano and fretboard references, interval practice, sequencers, and compact utilities for working musicians. Its strength is lateral exploration—following one musical question into three useful neighboring ones—rather than marching through a fixed curriculum.

What you can do there

• Browse visual references for scales, chords, intervals, rhythm, and instruments
• Choose a key in the all-in-one theory cheat sheet
• Open browser-based ear-training, tuning, and music-making tools

Why we picked it

Most reference pages make theory feel like furniture assembly instructions. muted.io gives the same material switches, diagrams, sound-oriented tools, and enough visual cross-links to encourage curiosity. The unusually wide spread from chord lookup to beat construction also makes it useful after the first theory question has been answered.

How to get the most from it

Start with the theory cheat sheet and choose the key you are playing in. Follow one link outward—perhaps the circle of fifths, piano chords, or an interval trainer—rather than trying to inventory the whole home page at once. Keep your instrument nearby; this is built as a companion bench, not assigned reading.

Good to know

The browser collection is presented as free, with donations invited. An optional 23-tool desktop bundle was listed at $17 as a one-time purchase during this check, and the home page also contains a labeled affiliate recommendation. Many tools are designed around audio, while tuners and the virtual piano advertise microphone or MIDI input.

Who made it, and when?

Sébastien (Seb) is the credited creator or organization.