I built a WebMIDI sequencer to control my hardware synths
Hey HN, I’m an ex-Google engineer trying to get back into music production. I needed a way to sequence my hardware synths using AI contexts without constantly switching windows, so I built this. It runs entirely in the browser using WebMIDI. No login required. It connects to your local MIDI devices (if you're on Chrome/Edge) and lets you generate patterns. Tech stack: [React / WebMIDI API / etc]. Link: www.simplychris.ai/droplets Code is a bit messy, but it works. Feedback welcome.
I built a WebMIDI sequencer to control my hardware synths launched on December 11, 2025 with 43 votes, #455 of 11,628 launches that month and more than 90% of that year's launches.
In plain words
This is a browser-based MIDI sequencer that runs entirely in the browser without requiring login. It connects directly to local MIDI devices through WebMIDI on Chrome and Edge, allowing users to control hardware synthesizers and generate patterns without switching windows. Built with React, the tool is designed for music producers who want to sequence external hardware synths efficiently from their computer.
written from the facts on this page · September 2026
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