Extron Electronics DMP 128 User Guide - Manual (Page 42)

Bass and treble shelving
Bass and treble shelving can be added to the filter. Known as shelving or tone controls,
the separate bass and treble filters provide the ability to cut or boost gain linearly above
or below a selected frequency, with the end-band shape giving the visual appearance of a
shelf.
If only a bass or only a treble filter is required, either bypass the unneeded control or set it
to Unused in the selection box.
The bass default frequency is 100 Hz and the treble default is 8 kHz.
notE: Selecting Bass & Treble Filters inserts two separate filters.
Figure 27. Bass and Treble Shelving
The corner frequency of the controls can be selected to 0.1 Hz accuracy. Two slopes,
6 and 12 dB/octave are available, along with the ability to boost or cut the signal up to
24 dB.
DMP 128 • Software Control 36