Installation

The preferred way to install is with pip / pip3:

pip install sound_weighting_filters

Usage

Import the module:

import ABC_weighting
import ITU_R_468_weighting

This has a single function:

get_zpk(curve='A', fs=False)

• curve defines the weighting filter and can be ‘A’, ‘B’ or ‘C’.

• fs sets the sampling rate of the digital system. Or False for an analogue filter.

and returns zeros, poles, gain of the filter.

For example:

z,p,k = ABC_weighting.get_zpk(fs = 48000)

The same applies to the ITU_R_468 module, for example:

z,p,k = ITU_R_468_weighting.get_zpk(fs = 48000)

Demo plots

Run:

python demo_ABC_weighting.py
python demo_ITU_R_468_weighting.py

Unit Tests

Both modules run unit tests if run as a main program. If the tests are run directly then they also plot the results:

python3 test_ABC_weighting.py
python3 test_ITU_R_468_weighting.py

Credits

• endolith@gmail.com, https://github.com/endolith

• Bernd Porr, https://github.com/berndporr/