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Image: gasfree.app · The GASFREE logo next to the rack: synthesizer panels with knobs and patch cables

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Gasfree: a rack of synthesisers in the browser

Started from wanting to try Moog's Subharmonicon, recreated in the browser.

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Credits

  • HN submitter tamat Source ↗

Earliest dated source: 23 Oct 2026

The full story

Years ago the author couldn't afford Moog's Subharmonicon, so they coded one with the Web Audio API to beat "gear acquisition syndrome". That grew into Gasfree, a free rack of synthesisers, drum machines, sequencers and effects in the browser. You patch them together with virtual cables, play them from a MIDI controller and write songs.

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Sources

From the maker's own write-up or code. We summarise what they report; we haven't tested it ourselves.

  • Hacker News: Show HN: Gasfree.app a Rack of Synthetizers in the BrowserBlog or write-upgasfree.app

    Open the synth rack in your browser.

  • Hacker News discussion (1 points)Forum threadnews.ycombinator.com
    HN submitter: tamatPosted 23 Oct 2026

    The Show HN post.

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