I blogged recently about the hum and found these links http://www.soundonsound.com/sos/jul05/articles/qa0705_1.htm http://www.soundonsound.com/sos/nov04/articles/computerproblems.htm http://www.rane.com/note110.html -- Malte Steiner media art + development -www.block4.com- next concert: Elektronengehirn 30.8. ICMC 2007, Copenhagen, Denmark