I Built a Sequencer for the Web
Hey HN! Last week I was working on a website and needed a way to synchronise visuals with live music. I've used MIDI controllers for this before, but I am travelling right now and don't have mine with me. So I had the crazy idea to build a browser extension that uses the keyboard as input and includes a sequencer. I gave myself 24 to work on it. It ended up taking longer (of course), specially since I ended up creating a demo, a small landing, docs, and an intro video. Took me one week from idea to launch (pushed quite a bit tbh). Features: - Works as a browser extension. Atm distributed…
I Built a Sequencer for the Web launched on October 2, 2024 with 5 votes, #1,922 of 5,185 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 2 years on.
What it does
A fun sequencer for The Web that runs as a browser extension.
A fun sequencer for the web that runs as a browser extension. Each channel can be set to trigger on the beat (sequencer), on keystroke, or randomly. The key bindings are designed for expressive usage in live settings. No mouse needed. MiniTAP posts messages to the window. What you do with them is up to you. Tap following the tempo to guess the BPM. Use the arrow keys for finefrom minitap.io
In the maker’s words, at launch
Hey HN! Last week I was working on a website and needed a way to synchronise visuals with live music. I've used MIDI controllers for this before, but I am travelling right now and don't have mine with me. So I had the crazy idea to build a browser extension that uses the keyboard as input and includes a sequencer. I…
Does a similar job
all alternatives →- IBI built a WebMIDI sequencer to control my hardware synthsDec 2025 · simplychris.ai · ▲43
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.
An attempt to rethink a music sequencer design2017 · github.com · ▲305Libre music sequencer for desktop and mobile platforms - helio-fm/helio-sequencer
- APA platform for remote piano lessons based on the Web MIDI API2024 · keyboardconnect.com · ▲224
I'm building a video conferencing app designed to facilitate better remote piano lessons. My hope is to solve a lot of the challenges piano tutors and new students deal with when taking lessons through Skype/Zoom. It leverages WebRTC's data transmission to send media, MIDI state, and (eventually) send sheet music files and other musical data. I'm surprised with how well the MVP has worked and would love to hear any feedback or suggestions!
A Simple Online Step Sequencer2022 · muted.io · ▲60Make simple 4-bar music loops in your browser using this simple online sequencer. A quick way to express your musical ideas and export them as MIDI.
Beats, a web-based drum machineJan 2026 · beats.lasagna.pizza · ▲160Hello all! I've been an avid fan of Pocket Operators by Teenage Engineering since I found out about them. I even own an EP-133 K.O. II today, which I love. A couple of months ago, Reddit user andiam03 shared a Google Sheet with some drum patterns [1]. I thought it was a very cool way to share and understand beats. During the weekend I coded a basic version of this app I am sharing today. I iterated over it in my free time, and yesterday I felt like I had a pretty good version to share with y'all. It's not meant to be a sequencer but rather a way to experiment with beats and basic sounds,…
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