def __init__(self, N=16, fs=96000, repeats=3):
"""Simplified usage for quick access to an MLS that performs the required
message calls in the right order. Can also be used as an example on how
to use the MLS class.
Example:
>>> mls = MLS_simple(N=18, fs=96000, repeats=4)
>>> y = some_system_to_identify(mls.samples)
>>> imp = mls.get_impulse(y)
>>> imp.plot()
>>> mls.plot_fft()
The impulse response is stored as a member variable in this class after it
has been extracted.
"""
emphasis_filter = RBJ(filtertype="highshelf",
gaindb=-10,
f0=100,
Q=0.707,
fs=fs)
B, A = emphasis_filter.get_coefficients()
self._mls = MLS(N=N, taps=TAPS[N][0], fs=fs, repeats=repeats, B=B, A=A)
self._mls.apply_emphasis()
# map the name to the internal representation of the samples
self.samples = self._mls.samples
def __init__(self, N=16, fs=96000, repeats=3):
"""Simplified usage for quick access to an MLS that performs the required
message calls in the right order. Can also be used as an example on how
to use the MLS class.
Example:
>>> mls = MLS_simple(N=18, fs=96000, repeats=4)
>>> y = some_system_to_identify(mls.samples)
>>> imp = mls.get_impulse(y)
>>> imp.plot()
>>> mls.plot_fft()
The impulse response is stored as a member variable in this class after it
has been extracted.
"""
emphasis_filter = RBJ(filtertype="highshelf", gaindb=-10, f0=100, Q=0.707, fs=fs)
B, A = emphasis_filter.get_coefficients()
self._mls = MLS(N=N, taps=TAPS[N][0], fs=fs, repeats=repeats, B=B, A=A)
self._mls.apply_emphasis()
# map the name to the internal representation of the samples
self.samples = self._mls.samples
@copyright: (c) 2015 Ronny Andersson
@license: MIT
'''
# standard library
from __future__ import print_function
import logging
# custom libraries
from zignal.filters.biquads import RBJ, Zolzer
if __name__ == '__main__':
logging.basicConfig(format='%(levelname)-7s: %(module)s.%(funcName)-15s %(message)s',
level='DEBUG')
gaindb = -6
f0 = 997
Q = 0.707
fs = 48000
# Create a Robert Bristow-Johnson type biquad filter
f1 = RBJ(filtertype=RBJ.Types.peak, gaindb=gaindb, f0=f0, Q=Q, fs=fs)
f1.plot_mag_phase()
f1.plot_pole_zero()
# Create an Udo Zolzer type biquad filter
f2 = Zolzer(filtertype=Zolzer.Types.peak, gaindb=gaindb, f0=f0, Q=Q, fs=fs)
f2.plot_mag_phase()
f2.plot_pole_zero()
@license: MIT
'''
# standard library
import logging
# custom libraries
from zignal.filters.biquads import RBJ, Zolzer
if __name__ == '__main__':
logging.basicConfig(
format='%(levelname)-7s: %(module)s.%(funcName)-15s %(message)s',
level='DEBUG')
gaindb = -6
f0 = 997
Q = 0.707
fs = 48000
# Create a Robert Bristow-Johnson type biquad filter
f1 = RBJ(filtertype=RBJ.Types.peak, gaindb=gaindb, f0=f0, Q=Q, fs=fs)
f1.plot_mag_phase()
f1.plot_pole_zero()
# Create an Udo Zolzer type biquad filter
f2 = Zolzer(filtertype=Zolzer.Types.peak, gaindb=gaindb, f0=f0, Q=Q, fs=fs)
f2.plot_mag_phase()
f2.plot_pole_zero()
# that would scale the impulse wrong.
self._impulseresponse.plot_fft(plotname=plotname,
window='rectangular',
normalise=False)
if __name__ == '__main__':
logging.basicConfig(
format='%(levelname)-7s: %(module)s.%(funcName)-15s %(message)s',
level='DEBUG')
fs = 48000 * 2
N = 13
#mls = _MLS_base(N=N, taps=TAPS[N][0])
#mls = MLS(N=N, taps=TAPS[N][0], fs=fs)
f = RBJ(filtertype="highshelf", gaindb=-10, f0=100, Q=0.707, fs=fs)
B, A = f.get_coefficients()
#mls = MLS(N=N, taps=TAPS[N][0], fs=fs, repeats=5, B=B, A=A)
mls = MLS_simple(N=N, fs=fs, repeats=4)
print(repr(mls))
print(mls)
y = mls.get_impulse(mls.samples)
#mls.plot_fft() # used with MLS_simple
y.plot_fft(window='rectangular', normalise=False) # used with MLS
print('++ End of script ++')
"""Plot the magnitude response. Phase is not included in this plot."""
assert hasattr(self, "_impulseresponse"), "call get_impulse(...) before trying to plot"
# A window function on the impulse response does not work here, since
# that would scale the impulse wrong.
self._impulseresponse.plot_fft(plotname=plotname, window='rectangular', normalise=False)
if __name__ == '__main__':
logging.basicConfig(format='%(levelname)-7s: %(module)s.%(funcName)-15s %(message)s',
level='DEBUG')
fs = 48000*2
N = 13
#mls = _MLS_base(N=N, taps=TAPS[N][0])
#mls = MLS(N=N, taps=TAPS[N][0], fs=fs)
f = RBJ(filtertype="highshelf", gaindb=-10, f0=100, Q=0.707, fs=fs)
B, A = f.get_coefficients()
#mls = MLS(N=N, taps=TAPS[N][0], fs=fs, repeats=5, B=B, A=A)
mls = MLS_simple(N=N, fs=fs, repeats=4)
print (repr(mls))
print(mls)
y = mls.get_impulse(mls.samples)
#mls.plot_fft() # used with MLS_simple
y.plot_fft(window='rectangular', normalise=False) # used with MLS
print('++ End of script ++')