Cordial — Give it a key. Get a band.
Chord progression generator and manipulator VST and more.
Cordial — Give it a key. Get a band. launched on June 19, 2026 with 3 votes, #6,959 of 23,463 launches that month and more than 50% of that year's launches.
What it does
Speed of auditioning a chord progression is second-to-none, ability to create a working backing track to supercharge songwriting. Nothing comes close in the same price class.
Cordial turns a key, a mode, and a progression into five working parts — one shared backbone driving four independent streams of MIDI, each on its own channel. Designed for quick ideas and easy sketching, whether you’re a seasoned pro or just getting started. Comes with dozens of presets spanning multiple genres for quick inspiration. Set a root key, a mode, a chord-progression preset, and a seed. This is the harmonic backbone every other part is built on. Reroll the seed for a fresh idea in the same key — or lock it once it’s right. Each layer reads the same backbone but carries its own rhythm, register, velocity, and style. Enable only the ones you need — each plays out on its own MIDI…from cordialvst.com
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I'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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