Beepster
And I guess to clarify more I understand that the R37 set to Flat applies the effect to the entire signal but I'm not fully grasping what happens when I turn it closer to the High Frequency end. Is that boosting or cutting highs? It's kind of too subtle to tell for me. The Meter knob... well I have no freaking clue what that is doing.
From the F1 Help File:-
R37 (High Frequency Pre-emphasis trim). Adjusts the gain reduction frequency response. The original hardware unit was designed for leveling in radio and TV broadcast applications. Due to an increase in high frequency content in FM broadcasting, the R37 control adds gain reduction at frequencies above 1kHz, based on the program material. Use this control to reduce or prevent over-modulation caused by the pre-emphasis (high-frequency sensitivity).
When set to the FLAT position, gain reduction is applied equally on all frequencies. When the control is moved toward the HF position, gain reduction is increased on the high frequencies. Experiment to achieve a good balance between low and high frequency limiting. This control is often useful for de-essing vocals (cut down sibilance by compressing high frequencies), but the FLAT setting is recommended for most music applications. To adjust the knob in fine increments, hold down the SHIFT key while moving the knob.
Hope that helps.
If not, shout back, and I'll try to explain what limited understanding I have of that statement..