When recording the guitars on my band's latest CD I have noticed that there is a constant "steaming/whistling" sound on the tracks that is similar to a boiling tea kettle. I am using an Ibanez SZ through Peavey JSX head with a Randall 2x12 with Jensens. The mic I am using is an SM57. It is going into my Behringer mixer and into my Yamaha XG sound card. I am using Sonar 3 to record. The cabinet is facing a concrete wall, but it is completely surrounded by thick cushions. I was just wondering if anyone has had similar problems. Can anyone think of a solution?