Try this: AUDIGY SOUND CARD DRIVERS, solves crackling sound problem.
Own an older creative sound blaster card? ie. Audigy, Audigy Gamer, Audigy 2 ZS, Audigy 4? Having problems with crackling sound that comes and goes when playing music on Vista or W7? Here is a link to a 3rd party driver that provides FULL FUNCTIONALITY SUPPORT for these older sound cards in both Windows Vista and W7. This driver will take nearly 15 minutes to completly install because it supports every function advertised for the Audigy card. Please be patient and press continue as each process of the driver installs.
Does that here too, while playing music or when on Youtube if I'm dong something else at the same time. Didn't happen with 7000. I'm on 7057 right now. My machine can run Crysis so it shouldn't be a problem