I made a tool for learning scales, chords, and how to combine them
This started out when I vibe-coded a guitar scale fingering generator. It came out pretty good, and I started adding stuff to it: chords, then how chords and scales interact. Then I added charts for other instruments I mess around with: piano, cello, alto recorder. There's a complexity toggle to go from basic harmony to extended/experimental stuff. It's honestly still mostly a toy, but I thought other people might be interested in playing with it. Source is on github, so it's easy enough to run locally and fork. https://github.com/aleshh/gtr-scales
I made a tool for learning scales, chords, and how to combine them launched on May 20, 2026 with 36 votes, #806 of 20,538 launches that month and more than 95% of that year's launches.
In plain words
This tool helps musicians learn scales, chords, and their relationships across multiple instruments including guitar, piano, cello, and alto recorder. It displays fingering charts and shows how scales and chords interact together. A complexity toggle lets users start with basic harmony or explore extended and experimental sounds. The source code is available on GitHub for local use and modification.
written from the facts on this page · September 2026
Does a similar job
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Guitar Dashboard – Open source music theory explorer for guitarists2018 · guitardashboard.com · ▲590A free, open source, music theory explorer for guitarists. Discover how scales and modes map to the fretboard and how chords work within scales.
Kord – Python tool for displaying guitar chords/scales on your terminal2020 · github.com · ▲173python framework for creating music applications. Contribute to synestematic/kord development by creating an account on GitHub.
Interactive Chord Finder, Free Piano Scale and Chord ExplorerFeb 2026 · interactivechordfinder.com · ▲9I built a free, browser-based tool for exploring scales, modes, and their diatonic chords. Pick any root note and scale (major, natural minor, all seven modes, and 70+ other scales) and instantly see which chords (triads, 7th, 9th, etc.) belong to that key. It also includes a built-in sequencer so if you've found interesting chords for your scale, you can arrange them into a progression and hear how they flow together. No need to switch between a theory reference and a DAW just to test whether a ii–V–I sounds right in your preferred scale. No signup, no ads, no paywall, just a tool I wished…
Cadence – A guitar theory app2025 · cadenceguitar.com · ▲195Hello HN, I just released this music theory and ear training mobile app for guitar which I've been working on for a bit more than a year on the side. The idea was to make something for the eternally "intermediate" guitarist (myself included). There are a lot of beginner apps which rely on learning songs, toolkits which give you a bunch of stuff with no explanation but not many in-between apps to actually learn and practice more generic and somewhat advanced stuff. The app contains short lessons, recaps and most importantly challenges (visual, audio and pure theory) along with a very complete…
Tweak your chord progressions for practice or composition2023 · chord-alt.vercel.app · ▲78I'm excited to share with HN a new pet project I've been working on to explore how AI can create and explain harmonic chord progressions - Chord Variations. The project uses GPT-4 to generate unique and interesting chord combinations based on user input chord progression. It's akin to having a virtual musical assistant that can help non-musicians and musicians alike explore and create harmonious sound without needing any prior knowledge of music theory. The generated chord suggestions maintain a similar vibe to the user input. Alternative chord progression includes extended chords, chord…
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