Sound starts after a few seconds


Hi guys, I’ll really appreciate if anybody could help me with my issue. I’ve been an ubuntu user for some time and haven’t had any problem until now that I installed MATE. Every time I play a video or any sound file, it starts playing, but there is no sound for about 3 or 4 seconds, then suddenly it comes out. What could be the cause of this sound delay? Please, help me here.