Thank you! Yeah, at some point it would be nice to do a little library of sound effects, and there we should definitely have some filters like that.

To be clear, we're not doing anything in the browser (yet). Futhark literate takes a .fut file and generates a markdown file, optionally with some image, video or sound files. So (unlike your language) this is all "offline".

glicol looks cool, thanks for the link!