Show HN: Draw.Audio – A musical sketchpad using the Web Audio API

Hello HN community!

Out of my love for synthesizers and web development, I created a free audio sequencer called draw.audio, which includes selectable scales, waveforms, effects, LFOs, and more.

While there are other “tone matrix” style webapps out there, I couldn’t find one that quite scratched the itch for a large grid layout, modern design, and easily accessible modulation controls. So that was the inspiration, alongside my addiction to synths and hardware jam-boxes like the Synthstrom Deluge.

Draw.audio uses the Web Audio API without any other frameworks or libraries. I tried to keep it as lightweight as possible. The to-do list includes a tutorial, pattern preset browsing, more audio effects, light visual animations, and open-sourcing it.

In case you'd like tips: • It’s more fun on touch screens, like an iPad. • It's kid friendly! In my limited testing, kids enjoy drawing on it. • The share button generates a direct link to anything you create.

A big thank you to Sheer Havoc for creating the logo and other graphics!

And thank you all for checking it out! I’d love to hear any feedback you have. -Randy (long-time lurker, first time poster, and HN fan from SF)

Nice! I hope the kiddo has fun!

Nice work. What's the underlying stack?

It's really just Javascript and the Web Audio API. For the share links, I'm using Postgres on the backend to store the jsons. Pretty simple!

How many bits of information are there? Might be able to put it straight in the url with base122.