Export Songs and Crackle

When I play my songs on Ubuntu Renoise I occasionally get crackles throughout the song. My cpu is only running at 20-30% so it’s not like Renoise is overloaded or anything.

If I buy Renoise and export songs are these crackles gonna be exported? Or is it a clean export?

Try increasing your buffer size in the Audio Device Settings.http://tutorials.renoise.com/wiki/Preferences#Device_Settings_.28Linux.29