New release of racket-audio

> [...] now also works with ffmpeg as backend and there's no special C-layer necessary anymore. The needed audio libraries are used directly.

https://racket.discourse.group/t/new-release-of-racket-audio/4209

> racket-audio is a small audio playback toolkit for Racket. It combines high-level asynchronous playback, optional metadata reading, file type sniffing, decoder backends, and libao based output

Available now from https://pkgs.racket-lang.org/package/racket-audio

(Thanks Hans!)