I've been using a Fostex Mr-8 mkII 8-track recorder as my primary means of recording music for almost 6 years now. I've always used SanDisk 8GB cards, each that say "30MB/s" on them and I've never had a problem. I recently decided to upgrade to a bigger card and bought a 16GB Kingston brand CompactFlash that says "ultimate 266X" on it. Ever since I've had this card, whenever I hit record on the machine, I get a constant pulsing buzzing sound that interferes with what I'm recording. When I try using one of my older cards, the buzzing isn't there, so I presume the issue is with this Kingston card. Might anybody know what about the card might be causing this interference and what I can do to get rid of it? It renders the card somewhat useless. Any help would be greatly appreciated.