index :: flt

flt.c_lpf~

LPF coefficient calculator for biquad filter

available since version: 0.1

---

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
  

• Q quality factory
  type: float
  

properties:

• @freq Get/set center frequency
  type: float
  units: Hz
  range: 20..20000
  default: 1000
  

• @q Get/set quality factor: @freq/BANDWIDTH
  type: float
  range: 0.01..100
  default: 1
  

• @active Get/set on/off dsp processing
  type: bool
  default: 1
  

• @osc (initonly) Get/set OSC server name to listen
  type: symbol
  

• @id (initonly) Get/set OSC address id. If specified, bind all properties to /ID/flt_c_lpf/PROP_NAME osc address, if empty bind to /flt_c_lpf/PROP_NAME.
  type: symbol
  

inlets:

• control signal
  type: control

outlets:

• b0
  type: audio
• b1
  type: audio
• b2
  type: audio
• a1
  type: audio
• a2
  type: audio

keywords:

filter biquad lowpass

See also: [flt.biquad~] [flt.lpf12~]

Authors: Alex Nadzharov, Serge Poltavsky

License: GPL3 or later