Hi, I was at a birthday party on Saturday night, and the "DJ" (just another student at my college) was playing music, from, I assume, iTunes. But, in between every song was a scratching or rewinding-sounding noise, where the next song would follow. Occasionally a scratching or rewinding noise would be in the middle of a song. Does anyone have the faintest idea what plugin or application this person was using? Need I be more descriptive? Thanks.