Not sure what's going on but goattracker is being weird on linux. It either plays too fast or way too slow compared to how it's supposed to sound. Terminal output:
ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.0.29/work/alsa-lib-1.0.29/src/pcm/pcm.c:7905:(snd_pcm_recover) underrun occurred