I was wondering if the presets (I've only listened to preset 1: Relaxation) are suppose to sound like white nose with a constant humming sound in the background. While listening to it, it sounded like a lot of hiss and fuzz with one semi-pulsating hum in the background. Is that what it is suppose to sound like or did I do something wrong during the preset. Also, I am using regular headphones from a CD player I bought several years ago and am not sure if it is a stereo headset or not, are all headphones considered stereo. Thanks a lot for any advise.