Comment by bnoordhuis

I suspect that it's a jab at ALSA which, for reasons unknown, ships with a full LISP interpreter[1] that it doesn't actually use...

Lennart Poetering is the author of PulseAudio. He probably has a bone or two to pick with ALSA.

[1] http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/precise/...