Harmonic tension:
Stable
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Deepen your harmony knowledge

Explore our theory resources and chord charts to master harmony.

How to Use Harmony Matrix

Explore Scales: Select a Key and Scale to see the corresponding chord matrix.
Playback: Click any chord to hear it played back with professional voicings.
Theory: Use the matrix to understand functional harmony and find related chords for your compositions.

Practice Tools

Practice tools from Sean's studio

Tuner, metronome, fretboard maps, harmony references, timing utilities, and creative prompts built for serious guitar practice.

Tuner Chromatic pitch reference — tune by ear or by microphone input.
Metronome Tap tempo, variable subdivision, and accent patterns for steady-time practice.
Fretboard Interactive neck diagram — find every note, scale, and chord shape in any key.
Harmony Builder Chord and scale relationships at a glance — diatonic functions, borrowed chords, and substitutions.
Delay Calculator Enter a BPM, get millisecond values for every note division — dotted, triplet, straight.
Backing Generator Generate a simple chord-loop backing track to improvise or practice solos over.
Rhythm Trainer Clap or tap along to groove patterns — trains your internal feel for backbeats and subdivisions.
Idea State A creative prompt generator — breaks writer's block by giving you a random starting constraint.