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| Verified | Patterns | Status |
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JPEG, PNG, WebP, GIF — max 5 MB. Cropped to square.
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BIQUAD — classic web-audio cascade with a sharp resonance peak. Most "acid" sounding (default).
LADDER — AudioWorklet diode-ladder approximation. Smoother, closer to a real circuit.
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A faithful web recreation (I try to) of the legendary Roland TB-303 Bass Line synthesiser. Built by David Elfström Lilja. tb303.com is a fan project and is not affiliated with Roland. All names & trademarks belong to their respective owners.
Want to learn how a real TB-303 actually works? This video walkthrough (by the amazing Captain Pikant!) covers the original's programming flow. Most of it carries straight over to this site.
Got bugs or ideas? Send them to hello@tb303.com.
If you’re digging it, treat me to a Coke Zero or two via the button below. Every coin helps keep the site online and ad-free.
tb303.com works on mobile but it's really built for a desktop or iPad. A proper mobile experience is on the way, just not here yet. Most things will be tiny.