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says...

It's a standard graphic EQ with one parametric EQ band to tune in or out
a selectable bass frequency between 40 to 80 Hz. A dedicated parametric
EQ would have several channels and it might also have bandwidth
adjustments for each channel.

I guess what I'm getting at, is where is the newbie faq on Parametric
EQ's? I have no clue what this thing does at a technical level,
compared to what the standard EQ sliders do.