audio_filters.butterworth_filter

Functions

make_allpass() → audio_filters.iir_filter.IIRFilter)	Creates an all-pass filter
make_bandpass() → audio_filters.iir_filter.IIRFilter)	Creates a band-pass filter
make_highpass() → audio_filters.iir_filter.IIRFilter)	Creates a high-pass filter
make_highshelf() → audio_filters.iir_filter.IIRFilter)	Creates a high-shelf filter
make_lowpass() → audio_filters.iir_filter.IIRFilter)	Creates a low-pass filter
make_lowshelf() → audio_filters.iir_filter.IIRFilter)	Creates a low-shelf filter
make_peak() → audio_filters.iir_filter.IIRFilter)	Creates a peak filter

Module Contents

audio_filters.butterworth_filter.make_allpass(frequency: int, samplerate: int, q_factor: float = 1 / sqrt(2)) → audio_filters.iir_filter.IIRFilter

Creates an all-pass filter

>>> filter = make_allpass(1000, 48000)
>>> filter.a_coeffs + filter.b_coeffs  
[1.0922959556412573, -1.9828897227476208, 0.9077040443587427, 0.9077040443587427,
 -1.9828897227476208, 1.0922959556412573]

audio_filters.butterworth_filter.make_bandpass(frequency: int, samplerate: int, q_factor: float = 1 / sqrt(2)) → audio_filters.iir_filter.IIRFilter

Creates a band-pass filter

>>> filter = make_bandpass(1000, 48000)
>>> filter.a_coeffs + filter.b_coeffs  
[1.0922959556412573, -1.9828897227476208, 0.9077040443587427, 0.06526309611002579,
 0, -0.06526309611002579]

audio_filters.butterworth_filter.make_highpass(frequency: int, samplerate: int, q_factor: float = 1 / sqrt(2)) → audio_filters.iir_filter.IIRFilter

Creates a high-pass filter

>>> filter = make_highpass(1000, 48000)
>>> filter.a_coeffs + filter.b_coeffs  
[1.0922959556412573, -1.9828897227476208, 0.9077040443587427, 0.9957224306869052,
 -1.9914448613738105, 0.9957224306869052]

audio_filters.butterworth_filter.make_highshelf(frequency: int, samplerate: int, gain_db: float, q_factor: float = 1 / sqrt(2)) → audio_filters.iir_filter.IIRFilter

Creates a high-shelf filter

>>> filter = make_highshelf(1000, 48000, 6)
>>> filter.a_coeffs + filter.b_coeffs  
[2.2229172136088806, -3.9587208137297303, 1.7841414181566304, 4.295432981120543,
 -7.922740859457287, 3.6756456963725253]

audio_filters.butterworth_filter.make_lowpass(frequency: int, samplerate: int, q_factor: float = 1 / sqrt(2)) → audio_filters.iir_filter.IIRFilter

Creates a low-pass filter

>>> filter = make_lowpass(1000, 48000)
>>> filter.a_coeffs + filter.b_coeffs  
[1.0922959556412573, -1.9828897227476208, 0.9077040443587427, 0.004277569313094809,
 0.008555138626189618, 0.004277569313094809]

audio_filters.butterworth_filter.make_lowshelf(frequency: int, samplerate: int, gain_db: float, q_factor: float = 1 / sqrt(2)) → audio_filters.iir_filter.IIRFilter

Creates a low-shelf filter

>>> filter = make_lowshelf(1000, 48000, 6)
>>> filter.a_coeffs + filter.b_coeffs  
[3.0409336710888786, -5.608870992220748, 2.602157875636628, 3.139954022810743,
 -5.591841778072785, 2.5201667380627257]

audio_filters.butterworth_filter.make_peak(frequency: int, samplerate: int, gain_db: float, q_factor: float = 1 / sqrt(2)) → audio_filters.iir_filter.IIRFilter

Creates a peak filter

>>> filter = make_peak(1000, 48000, 6)
>>> filter.a_coeffs + filter.b_coeffs  
[1.0653405327119334, -1.9828897227476208, 0.9346594672880666, 1.1303715025601122,
 -1.9828897227476208, 0.8696284974398878]