The tool

Drop-2 voicing explorer

A drop-2 voicing is a four-note chord with its second voice from the top dropped an octave — the article tells that story in full. Here is every one the Drop2 app teaches: pick a root, a chord quality, and a string set, and the four inversions are drawn and played the way the app plays them.

The explorer needs JavaScript to draw and play the voicings. For a static tour of the shapes — the four Cmaj7 inversions on the top strings, with audio — read the drop-2 article.

The voicings you hear are the app’s own sampled guitar — and the bass its Play-Along band’s — from the MuseScore General sound library, used under the MIT license.

Your eyes know these shapes. Drop2 checks whether your hands do.

Play any of these voicings into your phone’s microphone and the app hears whether the grip under your fingers is the one on the card — browse in Learn, get checked by ear in Train.

Download on the App Store

Free to start, no time limit · Works with acoustic and electric guitar