How do I make a sound play at a other length rather than the beginning?

I'll try my best to explain, I want to make it so a sound (yes, the class sound) would play at 5 seconds or so? What I'm trying to do is skip a length behind a audio like the audio would start at something like 0:30 and the parts before 0:30 would be skipped and not be heard, therefore making the sound shorter? I have a game that plays music, but when the music stops (it sets playing to false and uses sound:stop()) it would be at the same position, I can just use that, but I want it to start right away or something, could also use volume but still no. I can't make this question more understandable.