The playback is "Stuttery"

I´ve sent a topic before about this. Still the playback isn´t working properly. This is so annoying because it´s impossible for me to use. I arrange my songs in Hooktheory and export to waw files.
Can´t do that because the playback doesn´t flow at normal speed. Stops and continues. A kind of a “stuttery”. Please solve his bug.
Thank you :slight_smile: