input signal to be processed.
cutoff frequency.
the reciprocal of the slope S (Shell boost/cut slope).
When S = 1
, the shelf slope is as steep as it can be
and remain monotonically increasing or decreasing gain
with frequency. The shelf slope, in dB/octave, remains
proportional to S for all other values for a fixed
freq/sample-rate and gain
.
boost/cut at the cutoff frequency (in decibels).
A low shelf equalizer UGen. The B equalization suite is based on the Second Order Section (SOS) biquad UGen.
Note: Biquad coefficient calculations imply certain amount of CPU overhead. These plugin UGens contain optimizations such that the coefficients get updated only when there has been a change to one of the filter's parameters. This can cause spikes in CPU performance and should be considered when using several of these units.