pouët.net

kasideemusa by TVT [web]

kasideemusa.xd is the actual esoteric program and x-D.c is the interpreter.
It outputs 16 bit signed 48kHz mono.
One way to play it in linux (sox needed):
gcc x-D.c -o x-D && ./x-D kasideemusa.xd | sox -t raw -r 48000 -s -w -c 1 - -t ossdsp /dev/dsp