Methodology

This page describes how Chord Shuffle builds its chord catalogue, how live chord recognition works, and our editorial process.

Chord sourcing

Our catalogue of more than 100 chords is curated manually from recognised pedagogical sources. Every diagram is verified: fingering, muted strings, open strings, barre position where applicable. The tips associated with each chord are written by practising guitarists.

Microphone detection

Live chord recognition uses a fast Fourier transform (FFT) applied to the audio stream captured by the browser, followed by extraction of dominant frequencies and comparison against harmonic templates. All processing happens client-side — no audio data leaves the device.

Editorial process

Guides and chord pages are written by our editorial team and reviewed before publication. The last-updated date is visible on every guide. Corrections reported by users are integrated within a few weeks.

References

Our guides rely on authoritative sources listed at the end of each article (Wikipedia, recognised musical pedagogy). For music theory, we systematically cite the academic concepts we rely on (procedural memory, spaced repetition, etc.).