I'm wondering if there is any way to eliminate the high-freq hiss that is picked up when recording in live concert halls. There may be no way considering my set-up: 2 dynamic cardiod mics placed X stereo running into a Boss Br-864 (portable digital 8track recorder). I currently use the "hiss reduction" function in Adobe Audition to eliminate most of it... this function generally works well, but it does reduce some of the quality of the original wav file. I record live recitals at my school as a service to the students and myself, and this is the best I can do so far... under these circumstances, is there any suggestions to help me reduce the amount of ambient room noise (hiss) picked up during recording? Thank you.