filterdetail Reference

Detail the characteristics of a filter

filterdetail

Description

Use the filterdetail object to produce details from a filter specification provided as input. The filter specification may be generated by the filterdesign object, or by other means. The output includes the impulse response, step response, magnitude and phase responses, as well as phase and group delay.

Arguments

None.

Attributes

numpoints [int]

The resolution of the returned filter characteristics. You may reduce this to reduce the computational intensity of performing the detailing calculations, or increase it to gain greater resolution. By default, a resolution of 512 points is used.

Common Box Attributes

Messages

list

Arguments

a0 [float]
a1 [float]
a2 [float]
b1 [float]
b2 [float]
Specify a biquad filter using a list of five filter coefficients

dictionary

Arguments

dictionary-name [symbol]
A filterdesign dictionary specifying a filter in terms of its zeroes, poles, and gain or as a transfer function. The transfer function is expressed as a fraction with the FIR coefficients composing the numerator and the IIR coefficients composing the denominator. The zero-pole-gain representation is preferred because it yields a more numerically accurate result.

Output

list

  • leftmost outlet -- magnitude response
  • second outlet -- phase response
  • third outlet -- phase delay
  • fourth outlet -- group delay
  • fifth outlet -- impulse response
  • rightmost outlet -- step response

See Also

Name Description
Sound Processing Techniques Sound Processing Techniques
filterdesign
plot~
cascade~
biquad~
Audio Filtering Audio Filtering