Drop a song, hear the lesson. Chord progressions, keys, modes and BPM rendered live from the audio your students already know. Free for every classroom, every studio, every teacher.
Music theory is easier to teach when the audio is right there. SignalKey lets you analyse any reference track in front of a class — chord chart on screen, key labelled, Camelot mapped — without subscriptions, accounts, or installing software on managed lab machines. Use it K-12, college, masterclass or private lesson.
Every tool below is free, no signup, no watermark. Click any card to open it.
Show students the chord progression of a song they already love. Best demonstration of why a IV-V-vi-I works.
Quick way to teach relative major / minor with real recordings — show that A minor and C major share notes by analysing songs in each.
Teach circle of fifths visually using the same wheel professional DJs use. Bridges theory and practice.
Compare tempo across genres in a single class — hip-hop, classical, EDM. Real numbers, real audio.
Show how Western notation captures audio. Import the resulting .mid into Noteflight or MuseScore for sight-reading practice.
How a private-studio teacher uses SignalKey across a typical week.
Before the lesson, run the assigned cover song through Key Finder. Confirm the published key is correct (sometimes sheet music is wrong). Plan the warm-up scales accordingly.
In-class, drop the song into Chord Finder. The progression appears on screen. Pause on each chord, ask the student to play it on the piano. Connect ear to hands.
Open the Camelot Wheel page. Show that the song sits in 8A, and that 9A (the next slot) is the relative key. Tie this back to circle-of-fifths theory in the textbook.
Student picks a song. Brings the BPM, key and chord chart to next week's lesson. SignalKey is the homework tool — the student does the analysis, you verify and discuss.
“I assign 'find the key, find the chords' as homework now. SignalKey is the answer key students don't have to be afraid of — they verify what they hear.”
— Private studio teacher workflowNo. There are no accounts, no logins, no email collection. Every tool works without sign-up — important for K-12 environments where collecting student data is restricted.
Drop a track and see the full analysis pass — BPM, key, Camelot, stems, MIDI, LUFS — in one go.