Chord Builder
Click notes to build chords and hear simple synthesized tones. The labels are a beginner-friendly guide; consonance and dissonance also depend on tuning, musical style, voicing, and context.
Select Notes
Click on the keys below to start building a chord.
Octave 3
Octave 4
Octave 5
About Consonance & Dissonance
Often treated as relatively stable in common-practice Western harmony, depending on tuning and context.
A simplified label for sounds whose effect changes especially strongly with voicing and context.
Often treated as relatively tense in common-practice Western harmony; other musical traditions may hear or use them differently.
This independent tool uses Web Audio oscillators: triangle waves for chords and sine waves for note previews. It is not part of Blob Opera and does not reproduce Google's undisclosed harmony-model implementation.