Stuart Moss

Hi, I'm new to cakewalk and DAWs in general, and I was playing with the EQ on a drum track in a loop. Now, everytime the loop plays, the high hats get lower, by maybe a quarter tone. What did I do to make this happen, and how do I fix this? (It may not have been the EQ, I was probably also mucking around with other dials and buttons around the place.)