That's great! Most microphones you buy include a frequency response graph, but the SPL meter does not. He mentions the cost as being $35 which makes me think he is referring to the analouge display model (I used the digital one, and that seems to be the more common). I'll try to contact him. I assume the pickups are the same, I'm just wondering if they built the response curve into the unit (or the compensation rather).

One thing they are hinting at is using tones that are at every 1/3 octave. That is what I intend as my "Advanced Parametric EQ" tutorial. You will actually actually draw a graph from your readings and then choose your frequency points (instead of using the default ones).