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sound_FM_unit.py
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sound_FM_unit.py
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import numpy as np
from sound_FM_envelope import set_FME
# UNIT-TONE
def FM_unitT(sound_a,duration,note,ratio,feedback,sampling):
length_of_s = int(duration)
s = np.zeros(length_of_s)
f0 = sound_a * np.power(2, note / 12)
fm = f0*ratio
sb = 0
for n in range(length_of_s):
s[n] = fm / sampling * n + sb * feedback
sb = np.sin(2 * np.pi * s[n])
return s
# UNIT-FREQ
def FM_unitF(sound_a,duration,f,ratio,feedback,sampling):
length_of_s = int(duration)
s = np.zeros(length_of_s)
f0 = f
fm = f0*ratio
sb = 0
for n in range(length_of_s):
s[n] = fm / sampling * n + sb * feedback
sb = np.sin(2 * np.pi * s[n])
return s
# UNIT-SOUND
def FM_sound(sp):
length_of_s = len(sp)
s = np.zeros(length_of_s)
for n in range(length_of_s):
s[n] = np.sin(2 * np.pi * sp[n])
so = set_FME(s)
return so
# MIX
def FM_MIX(s1,s2,ratio):
length_of_s = len(s1)
s = np.zeros(length_of_s)
for n in range(length_of_s):
s[n] = np.sin(2 * np.pi * s1[n])*ratio + np.sin(2 * np.pi * s2[n])*(1.0 - ratio)
return s
# MIX
def FM_ADD(s1,s2,ratio):
length_of_s = len(s1)
s = np.zeros(length_of_s)
for n in range(length_of_s):
s[n] = s1[n]*ratio + s2[n]*(1.0 - ratio)
return s
# MODULATE
def FM_MODULATE(s1,md,power,feedback):
width = len(s1)
length_of_s = len(md)
s = np.zeros(length_of_s)
fb = 0
idx = 0
for n in range(length_of_s):
s[n] = fb*feedback
i1 = int(idx)
i2 = i1 + 1
f2 = idx - i1
if 0<= i1 and i1<width :
s[n] = s[n] + s1[i1]*(1.0-f2)
if 0<= i2 and i2<width :
s[n] = s[n] + s1[i2]*f2
sb = np.sin(2 * np.pi * s[n] )
st = md[n]
idx = idx + (1 + st)*power
return s
# MODULATE
def FM_MODULATE_S(s1,s2,power,feedback):
width = len(s1)
length_of_s = len(s2)
s = np.zeros(length_of_s)
fb = 0
idx = 0
for n in range(length_of_s):
s[n] = fb*feedback
i1 = int(idx)
i2 = i1 + 1
f2 = idx - i1
if 0<= i1 and i1<width :
s[n] = s[n] + s1[i1]*(1.0-f2)
if 0<= i2 and i2<width :
s[n] = s[n] + s1[i2]*f2
sb = np.sin(2 * np.pi * s[n] )
st = np.sin(2 * np.pi * s2[n])
idx = idx + (1 + st)*power
return s