does anyone have any details about tape calibration for a teac A- 3340s? i have just purchased a mrl tape and am struggling with the details of calibration for this particular machine. i can only find playback head adjustment screws for the left and right (not all 4 tracks), and there is no seperate controls for higher or lower frequencies. does anyone have any experience with calibrating this (or a similar) machine, or maybe a manual? any help would be much appreciated. thanks.