SuperCollider CLASSES

BLowShelf

Low Shelf

Description

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.

Class Methods

*ar (in, freq: 1200, rs: 1, db: 0, mul: 1, add: 0)

Arguments:

in

input signal to be processed.

freq

center frequency. WARNING: due to the nature of its implementation frequency values close to 0 may cause glitches and/or extremely loud audio artifacts!

rs

the reciprocal of 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/SampleRate.ir and db.

db

gain. boost/cut the center frequency in dBs.

mul
add

Inherited class methods

Undocumented class methods

*sc (dummy, freq: 120, rs: 1, db: 0)

Instance Methods

Inherited instance methods

Examples

s.boot;
(
z = { // toy around with boost/cut
BLowShelf.ar(
    SoundIn.ar([0,1]),
    MouseX.kr(40, 6000, \exponential),
    1.0, // rs
    MouseY.kr(24.0, -24.0, \linear),
    0.5); // mul
}.play)
z.release;

(
z = { // toy around with rs
BLowShelf.ar(
    SoundIn.ar([0,1]),
    MouseX.kr(20, 6000, \exponential),
    MouseY.kr(0.1, 1.0, \linear), // rs
    6,
    0.5); // mul
}.play)
z.release;