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Dev tools · May 22, 2026

MIDI Piano & Guitar Chords

Free music theory tools for any MIDI keyboard — web & mobile

MIDI Piano & Guitar Chords launched on May 22, 2026 with 3 votes, #3,449 of 20,538 launches that month and more than 50% of that year's launches.

What it does

FreeMIDIChords is a free, open-source music theory tool suite that works with any MIDI keyboard — no installation required for the web version, no subscriptions, no paywalls. Plug in any MIDI keyboard and it detects chords and intervals in real time Visualizes them on staff notation, a piano keyboard, and an interactive circle of fifths Works in reverse too — pick a chord and hear it played back through MIDI or built-in audio Includes scales, and metronome

Herramienta online gratuita: detecta y genera acordes en piano y guitarra, círculo de quintas interactivo, escalas, metrónomo y afinador. Usa teclado MIDI o ratón. Sin instalación en el navegador.

Pulsa una tecla del piano o usa un dispositivo MIDI para identificar la nota. Este proyecto está pensado para mantenerse siempre gratis y sin publicidad. Tu ayuda permite cubrir costes de desarrollo, mantenimiento, infraestructura y tiempo de soporte para seguir mejorándolo. Puedes enviarnos comentarios sobre la página y sugerencias de mejora para seguir evolucionando la herramienta. Para usar un teclado/controlador MIDI en detección, activa la entrada MIDI. Selecciona las notas que podrán aparecer como segunda nota delfrom freemidichords.com

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    A simple web game to help learn chords and basic progressions2024 · chords.yottanami.com · ▲215

    Hi Hacker News, I've created Chord Nebula, a simple web-based game designed to help users learn and practice piano chords, basic progressions, and harmony fundamentals. The game integrates with MIDI keyboards, allowing you to play chords in real-time and receive immediate feedback based on the key you choose. GitHub Repository: https://github.com/yottanami/chord_nebula Live Demo: https://chords.yottanami.com Requirements: To use Chord Nebula, you'll need a MIDI keyboard connected to your computer. Current Status: Chord Nebula is still a simple project. I'm…

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