Options Explain

First button I didn't have to explain, I think.

Center Space - this is space in BU (Blender Unit) between left and right channel section.
Count X - number of visualizer's columns.
Space X - space between each column of visualizer.
Slash - Adding V-like shape when both channels are visible, with optional rotation near it.
Mode - ummm, mode.
[some options for modes, like size or array-space]
Driver Power - amplification of signal, acts on the height of visualization.

Channels - visible channels/channels to bake.
Files Paths - like the name, WARNING: each channel need to be a separate sound file. (If you want have true stero data baked)
Frequency Mode - leave it as default (Tercja), it is a good-way sound bake system, based on audio physics.
Start Frame - start frame of animation-visualisation (sound start).
Min/Max Freq - As you mean, edge frequences of baking audio.
Bake animation data - generate main visulation data!

Bake Sound to F-Curves options - others options of blender's sound bake engine, you can see them when you use this function in graph editor, it is shows in bottom left corner of file manager

Attack - Who knows? I don't know exactly.
Relase - time of buffer, if larger then bars are slower (only in down direction, some buffer-like)
Tresholdhiewfahipeipg - I dunno.
Please experiment! Remember to rebake animation data after changing values of this secion!