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Would be a cool addition to let users upload an mp3 and then act on it with the AudioWorklet to do stuff like bit crushing.

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Great idea! Have implemented it, refresh and check it out.

Could you also try adding a polyfill for non-Chrome browsers? e.g. https://github.com/jariseon/audioworklet-polyfill

Had a crack at it but it throws NotSupportedException in both Firefox and Safari. There are also some parts that don't conform to the spec and break. Filing an issue...

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