Music theory tools, free and in your browser.
Interactive tools for working musicians, students, and teachers — built around the same scale-degree-first model as the Fifths ear-training app. No signup, no email, audio runs locally.
Circle of Fifths — interactive
Click any wedge to hear the chord. Switch tonic and mode in one tap. See the key signature, the diatonic chords, and common progressions like ii–V–I and I–V–vi–IV that play through automatically.
Vocal range test
Sing into your mic, see your range mapped to a piano keyboard, and find your voice type — soprano, alto, tenor, baritone, bass. No signup. Result is shareable.
Interval ear trainer
Hear an interval, name it. Free, no-signup version of the core Fifths trainer — major/minor seconds through octaves, in any key.
Note identification
Treble and bass clef quizzer. Read a note off the staff, hit the keyboard. Tracks accuracy by clef, by note, by ledger position.
Chord progression generator
Pick a key and a vibe. Get a four-bar progression with audio playback, leadsheet symbols, and Roman numerals — for songwriting, practice, or teaching.
Solfege practice
Drill movable-do solfege with hand signs, in any key, with audio. Includes chromatic and minor variants for choral and Kodály classroom use.
Why we make these free
Every tool here is a hands-on version of something we teach inside the Fifths ear-training app. The tools work on their own — no signup, no email gate, audio runs locally — and if you find them useful, the app is the next step: it tracks which intervals, scale degrees, and keys keep tripping you up, and drills those specifically.
Try the app free →