every few minutes when playing a song through sonar (on my emu1212m and my tascam fw1804) i hear a SHHHHHH noise for a split second, it even happened when i explorted to wav. it doesnt happen on mp3s i play or anything else, but apparently sonar writes the noise to wav files if it happens when im bouncing. what is this noise? ive tried changing my latency alot and cant get rid of it. with either unit. heres the noise im talking about http://www.bluesunday.net/noise.wav this has been happening a long time! please help. changing latency doesnt fix it.