Yes, I know that, thanks again but I meant as what exactly the above mentioned fields are acting?
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Wait, you want to know what specific frequency ranges are being changed based on the filter type? I'm not understanding what you want, specifically.
Low Freq generally refers to anything below 600 Hz, Low Freq Gain refers to the added amplitude of the Low Freq range, High Freq refers to anything above 6 kHz generally, and the gain is the change in amplitude. Low pass is just something that puts a steep amplitude cut on anything above 1kHz or so, depending on what you are using, and high pass is the inverse, generally the filter starts to cut at around 6kHz and descends from there. Essentially, a low pass allows the low sounds to pass through and stops the highs, and vice versa for the high pass.
Is that what you wanted to know?