Is dust messing with my audio?

I disassembled my PC earlier to try and add a new graphics card and power supply, but they were too big :/. During my attempts I may have blown some dust inside everywhere. I think now it is causing my audio to lag, because when listening to audio on my PC it sounds like somebody is shoving a piece of paper in a fan blade for a few seconds. Could I get a blow dryer and blow some of the dust out from the outside of my PC or do I need to do something else?