def system_build(gdb_list,size=256,max_gdb=6):
"""
return a set of bins that can be plotted.
"""
fs = 44100.0
fc_list,bw_list = system_parameters()
#print fc_list
#print bw_list
g0_list = system_solve(44100,fc_list,bw_list,gdb_list,max_gdb)
print g0_list
bins = [0]*size
for fc,bw,gdb in zip(fc_list,bw_list,g0_list):
#for fc,bw,gdb in ( (fc_list[3],bw_list[3],g0_list[3]), ):
ag = abs(gdb);
# 3/ag cuts the bw by .5 at a |gdb|=6, .25 at |gdb|=12, and .125 at |gdb|=24.
# approximatley, the zbpeak filter
#bw = bw if ag < 3 else bw*(2.0/ag);
for i in range(size):
p = zbdesign.zbpeak_param(fs,fc,bw,gdb)
# this regression provides a value f
# distributed evenly on a logarithmic scale
# across all of the octaves
bins[i] += mag(p.b_num,p.a_den,i2f(i),fs)
return (bins,g0_list)
def system_build(gdb_list, size=256, max_gdb=6):
"""
return a set of bins that can be plotted.
"""
fs = 44100.0
fc_list, bw_list = system_parameters()
#print fc_list
#print bw_list
g0_list = system_solve(44100, fc_list, bw_list, gdb_list, max_gdb)
print g0_list
bins = [0] * size
for fc, bw, gdb in zip(fc_list, bw_list, g0_list):
#for fc,bw,gdb in ( (fc_list[3],bw_list[3],g0_list[3]), ):
ag = abs(gdb)
# 3/ag cuts the bw by .5 at a |gdb|=6, .25 at |gdb|=12, and .125 at |gdb|=24.
# approximatley, the zbpeak filter
#bw = bw if ag < 3 else bw*(2.0/ag);
for i in range(size):
p = zbdesign.zbpeak_param(fs, fc, bw, gdb)
# this regression provides a value f
# distributed evenly on a logarithmic scale
# across all of the octaves
bins[i] += mag(p.b_num, p.a_den, i2f(i), fs)
return (bins, g0_list)
def system_coeff(fs,fc,bw,fc_list):
# scaling by 3.0 then dividing by 3.0 gives
# a better output than using 1.0, but it's not significant
# when the range is -6 to 6, the average is ~3 *waves hands* over logic
p = zbdesign.zbpeak_param(fs,fc,bw,3.0)
return [ mag(p.b_num,p.a_den,f,fs)/3.0 for f in fc_list ]
def system_coeff(fs, fc, bw, fc_list):
# scaling by 3.0 then dividing by 3.0 gives
# a better output than using 1.0, but it's not significant
# when the range is -6 to 6, the average is ~3 *waves hands* over logic
p = zbdesign.zbpeak_param(fs, fc, bw, 3.0)
return [mag(p.b_num, p.a_den, f, fs) / 3.0 for f in fc_list]