index :: flt

flt.c_pole

aliases: [ceammc/pole->biquad], [pole->biquad]

One-pole coefficient calculator for biquad filter

available since version: 0.9.2

---

information

Calculates coefficients for transfer function: H(z)=(b0 + b1z⁻¹ + b2z⁻²)/(1 + a1z⁻¹ + a2z⁻²)

arguments:

• FREQ center frequency
  type: float
  units: Hz
  

properties:

• @freq Get/set center frequency
  type: float
  units: Hz
  range: 0..22050
  default: 1000
  

• @rad (initonly) Get/set use angular frequency
  type: flag
  

• @mode Get/set filter modey
  type: symbol
  enum: hpf, lpf
  default: lpf
  

• @lpf Get/set to @mode lpf
  type: alias
  

• @hpf Get/set ti @mode hpf
  type: alias
  

inlets:

• filter frequency
  type: control

outlets:

• list: b0 b1 b2 a1 a2
  type: control

keywords:

filter biquad one pol

See also: [flt.c_lpf]

Authors: Serge Poltavsky

License: GPL3 or later