object Resonz extends ProductReader[Resonz] with Serializable
A two pole resonant filter UGen. It has zeroes at z = +1 and z = -1.
Based on K. Steiglitz, "A Note on Constant-Gain Digital Resonators", Computer Music Journal, vol 18, no. 4, pp. 8-10, Winter 1994.
Examples
// modulated frequency play { val in = Saw.ar(200) * 0.5 val freq = SinOsc.ar(XLine.ar(0.3, 100, 20)).mulAdd(3600, 4000) Resonz.ar(in, freq) }
// mouse controlled frequency and Q play { val in = WhiteNoise.ar(0.5) val freq = MouseX.kr(200, 10000, 1) val q = MouseY.kr(1, 100, 1) // bottom to top val flt = Resonz.ar(in, freq, q.reciprocal) flt * q.sqrt // compensate for energy loss }
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- def ar(in: GE, freq: GE = 440.0f, rq: GE = 1.0f): Resonz
- in
input signal to be filtered
- freq
resonant frequency in Hertz
- rq
reciprocal of Q. The Q (or quality) is conventionally defined as center-frequency / bandwidth, meaning that rq = bandwidth / center-frequency. A higher Q or lower rq produces a steeper filter.
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- def kr(in: GE, freq: GE = 440.0f, rq: GE = 1.0f): Resonz
- in
input signal to be filtered
- freq
resonant frequency in Hertz
- rq
reciprocal of Q. The Q (or quality) is conventionally defined as center-frequency / bandwidth, meaning that rq = bandwidth / center-frequency. A higher Q or lower rq produces a steeper filter.
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