i had no problems on the OSX version of MilkyTracker, but on the Linux version ( Mint-Debian, testing the version 0.90.80 from Debian repository ), sometimes the PlaySng button doesn't work - i don't know what is causing this
the Terminal shows:
SDL: Using audio driver: alsa
SDL: Buffer size = 2048 samples (requested 2048)
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured
ALSA lib pcm.c:7223:(snd_pcm_recover) underrun occured