Why does my renoise mute the whole song (for like one sec or less) during playback sometimes… 
I’m only using like 24% of the CPU but my memory is pretty low… could it be that? Or some setting in renoise? or someting else? =)
/nadom
is it renoise? your drivers? your pc?
latency settings ok? try some changes in your renoise-audio-settings … could be anything
Some more questions 
Does this happen all the time or with an specific song?
How do your trackscopes look like when the sound is muted?
P.T: All the time, and the trackscopes “moves” =)