The shape appears for the final 3 seconds.
Play at your own pace. Listen and check the shape yourself.
Automatic note detection
Ready to tune
Allow microphone access to start tuning.
Pluck one open string and let it ring. A chime confirms it’s in tune.
Your microphone audio stays on this device.
Play only the three marked strings. Fret 0 is an open string.
Low E → high e · × mute · ○ open
Solid marker = root · Dots show notes, not fingers.
Open grips ring freely. Movable shapes give you more control over muting. Compact voicings leave space for a bass player or another guitar.
A curated set of practical grips in standard tuning, through fret 15 — not every possible fingering. Shells intentionally omit the fifth. Choose a shape that suits your hands and the arrangement.
References: JustinGuitar barre chords · Tom Quayle’s shell voicings · Open Music Theory harmony