muted.io
Verified working Aug 19, 2026
Interactive music theory references for scales, chords, keys, and intervals.
muted.io is a collection of browser-based music theory tools, visual references, and simple practice utilities. It covers common concepts like scales, chords, intervals, key signatures, tuners, fretboards, rhythm, and piano references, with a desktop app available for Mac, Windows, and Linux.
Why it stands out
- Combines many small music-theory utilities in one place instead of splitting them across separate single-purpose sites.
- Strong coverage of both keyboard and fretted-instrument views, including guitar, bass, and ukulele fretboards.
- Includes creative mini-tools such as beat makers and sequencers alongside reference charts and drills.
- Desktop app option lets users keep theory references available outside the browser.
Good to know
- More of a reference-and-practice toolbox than a structured course with lessons, assignments, or teacher feedback.
- Instrument coverage is centered on piano, guitar, bass, and ukulele, so other instrumentalists may find fewer tailored references.
- The desktop app is separate from the web version and may not mirror every online tool exactly.
Under the radar: The key-specific scale links on the homepage are useful to bookmark directly if you frequently practice in the same few keys.
Photos
Beginning musicians and self-taught producers can quickly look up practical theory concepts while practicing or composing. Check which chords belong in a key before writing a progression. Explore scales, modes, and intervals with visual piano or fretboard references. Use built-in tuners, BPM counting, rhythm drills, and note-identification tools during practice. Keep quick-reference theory tools open on desktop while working on music.
Interactive tools for scales, modes, chords, intervals, circle of fifths, chord transposition, tuners, fretboards, rhythm practice, virtual piano, simple sequencers, note reading, and music theory cheat sheets. Includes dedicated references for piano, guitar, bass, and ukulele, plus a downloadable desktop app for major operating systems.
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