How to use a parametric equalizer<br>Use the hi-pass and low-pass filter. [substeps] On many software programs, there is a high-pass and a low-pass function. The high-pass button will generally cut any frequencies below 100hz and sometimes 80hz.
The high-pass button will generally cut most frequencies. 
The high-pass button will cut some frequencies but not most as it is limited in scope. I don't think the system knows the scope of the frequencies. 
( z1 cut :ARG0 ( z2 button :instrument-of ( z3 pass :ARG1-of ( z4 high ) ) ) :ARG1 ( z5 frequency :mod ( z6 most ) ) :ARG1-of ( z7 general ) )