Two, Five, One.

What you get

Six classic voicing styles — bebop shells, rootless A and B forms, Red Garland–style block chords, quartal voicings, and the "So What" voicing — each in all 12 major keys, with engraved notation, piano audio, and MIDI files you can drop into your DAW or notation software. No email gates, no paywalled PDF. A new voicing is featured on the front page every day, picked deterministically from the collection: same voicing for everyone, like a daily puzzle.

All voicings are original teaching material written in the grammar of the named traditions — transcribed idioms, not transcriptions. Authored once at the piano, then transposed by software with correct enharmonic spelling and checked against low-interval limits, so the E major page is as playable as the C major page.

Who makes this

I'm Tomáš Jochmann, a jazz pianist and developer. TwoFiveOne is the notation-shaped sibling of my main project, Earonman — a gamified ear trainer that takes you from first intervals to hearing exactly the extended voicings on this site. The two are meant to be used together: read the voicing here, then learn to hear it there.

Colophon

Notation engraved with Verovio; audio rendered with FluidSynth and the MuseScore General soundfont; site built with Astro and served as pure static HTML. Voicing data and pages are generated from one hand-curated library — if you spot a musical error, tell me and it gets fixed in every key at once.