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Bass and Treble Shelving
Bass and treble shelving may be added to the filter. Also 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 29. Bass and Treble Shelving
The corner frequency of the controls may be selected to 0.1 Hz accuracy. Two slopes,
6 and 12dB/octave are available along with the ability to boost or cut the signal up to
24dB.
DMP128 • Software Control 38