def mstf(ms, r=None):
if r is not None:
ms = rand(ms, r)
frames_in_ms = audio_params[2] / 1000.0
frames = ms * frames_in_ms
return int(frames)
def mstf(ms, r=None):
if r is not None:
ms = rand(ms, r)
frames_in_ms = audio_params[2] / 1000.0
frames = ms * frames_in_ms
return int(frames)
def cross(snds, length, maxlen=None):
out = ''
for i, snd in enumerate(snds):
fadelen = length if maxlen is None else rand(length, maxlen)
if i == 0:
out = crosstwo(snds[i], snds[i+1], fadelen)
elif i < len(snds) - 1:
out = crosstwo(out, snds[i+1], fadelen)
return out
def cross(snds, length, maxlen=None):
out = ''
for i, snd in enumerate(snds):
fadelen = length if maxlen is None else rand(length, maxlen)
if i == 0:
out = crosstwo(snds[i], snds[i + 1], fadelen)
elif i < len(snds) - 1:
out = crosstwo(out, snds[i + 1], fadelen)
return out
def bln(length, low=3000.0, high=7100.0, wform='sine2pi'):
""" Time-domain band-limited (citation needed) noise generator.
Generates a series of single cycles of a given wavetype
at random frequences within the supplied range.
Sounds nice & warm, if you ask me.
"""
outlen = 0
cycles = ''
while outlen < length:
acycle = cycle(rand(low, high), wform)
outlen += len(acycle)
cycles += acycle
return cycles
def bln(length, low=3000.0, high=7100.0, wform='sine2pi'):
""" Time-domain band-limited (citation needed) noise generator.
Generates a series of single cycles of a given wavetype
at random frequences within the supplied range.
Sounds nice & warm, if you ask me.
"""
outlen = 0
cycles = ''
while outlen < length:
acycle = cycle(rand(low, high), wform)
outlen += len(acycle)
cycles += acycle
return cycles
def wavetable(wtype="sine", size=512, highval=1.0, lowval=0.0):
""" The end is near. That'll do, wavetable()
"""
wtable = []
wave_types = [
"sine", "gauss", "cos", "line", "saw", "impulse", "phasor", "sine2pi",
"cos2pi", "vary", "flat"
]
if wtype == "random":
wtype = wave_types[int(rand(0, len(wave_types) - 1))]
if wtype == "sine":
wtable = [
math.sin(i * math.pi) * (highval - lowval) + lowval
for i in frange(size, 1.0, 0.0)
]
elif wtype == "hann" or wtype == "hanning":
wtable = [
0.5 * (1 - math.cos((2 * math.pi * i) / (size - 1)))
for i in range(size)
]
elif wtype == "gauss":
def gauss(x):
# From: http://johndcook.com/python_phi.html
# Prolly doing it wrong!
a1 = 0.254829592
a2 = -0.284496736
a3 = 1.421413741
a4 = -1.453152027
a5 = 1.061405429
p = 0.3275911
sign = 1
if x < 0:
sign = -1
x = abs(x) / math.sqrt(2.0)
t = 1.0 / (1.0 + p * x)
y = 1.0 - (((((a5 * t + a4) * t) + a3) * t + a2) * t +
a1) * t * math.exp(-x * x)
return abs(abs(sign * y) - 1.0)
wtable = [
gauss(i) * (highval - lowval) + lowval
for i in frange(size, 2.0, -2.0)
]
elif wtype == "sine2pi":
wtable = [
math.sin(i * math.pi * 2) * (highval - lowval) + lowval
for i in frange(size, 1.0, 0.0)
]
elif wtype == "cos2pi":
wtable = [
math.cos(i * math.pi * 2) * (highval - lowval) + lowval
for i in frange(size, 1.0, 0.0)
]
elif wtype == "cos":
wtable = [
math.cos(i * math.pi) * (highval - lowval) + lowval
for i in frange(size, 1.0, 0.0)
]
elif wtype == "itri":
# Inverted triangle
wtable = [
math.fabs(i) for i in frange(size, highval, lowval - highval)
] # Only really a triangle wave when centered on zero
elif wtype == "tri":
wtable = [(2.0 / (size + 1)) *
((size + 1) / 2.0 - math.fabs(i - ((size - 1) / 2.0)))
for i in range(size)]
elif wtype == "saw" or wtype == "line":
wtable = [i for i in frange(size, highval, lowval)]
elif wtype == "phasor":
wtable = wavetable("line", size, highval, lowval)
list.reverse(wtable)
elif wtype == "impulse":
wtable = [float(randint(-1, 1)) for i in range(size / randint(2, 12))]
wtable.extend([0.0 for i in range(size - len(wtable))])
elif wtype == "vary":
if size < 32:
bsize = size
else:
bsize = size / int(rand(2, 16))
btable = [[
wave_types[int(rand(0,
len(wave_types) - 1))],
rand(lowval, highval)
] for i in range(bsize)]
if len(btable) > 0:
btable[0] = lowval
else:
btable = [lowval]
wtable = breakpoint(btable, size)
elif wtype == "flat":
wtable = [highval for i in range(size)]
return wtable
def stf(s, r=None):
if r is not None:
s = rand(s, r)
ms = s * 1000.0
return mstf(ms)
def wavetable(wtype="sine", size=512, highval=1.0, lowval=0.0):
""" The end is near. That'll do, wavetable()
"""
wtable = []
wave_types = ["sine", "gauss", "cos", "line", "saw", "impulse", "phasor", "sine2pi", "cos2pi", "vary", "flat"]
if wtype == "random":
wtype = wave_types[int(rand(0, len(wave_types) - 1))]
if wtype == "sine":
wtable = [math.sin(i * math.pi) * (highval - lowval) + lowval for i in frange(size, 1.0, 0.0)]
elif wtype == "hann" or wtype == "hanning":
wtable = [ 0.5 * ( 1 - math.cos((2 * math.pi * i) / (size - 1))) for i in range(size) ]
elif wtype == "gauss":
def gauss(x):
# From: http://johndcook.com/python_phi.html
# Prolly doing it wrong!
a1 = 0.254829592
a2 = -0.284496736
a3 = 1.421413741
a4 = -1.453152027
a5 = 1.061405429
p = 0.3275911
sign = 1
if x < 0:
sign = -1
x = abs(x)/math.sqrt(2.0)
t = 1.0/(1.0 + p * x)
y = 1.0 - (((((a5 * t + a4) * t) + a3) * t + a2) * t + a1) * t * math.exp(-x * x)
return abs(abs(sign * y) - 1.0)
wtable = [gauss(i) * (highval - lowval) + lowval for i in frange(size, 2.0, -2.0)]
elif wtype == "sine2pi":
wtable = [math.sin(i * math.pi * 2) * (highval - lowval) + lowval for i in frange(size, 1.0, 0.0)]
elif wtype == "cos2pi":
wtable = [math.cos(i * math.pi * 2) * (highval - lowval) + lowval for i in frange(size, 1.0, 0.0)]
elif wtype == "cos":
wtable = [math.cos(i * math.pi) * (highval - lowval) + lowval for i in frange(size, 1.0, 0.0)]
elif wtype == "itri":
# Inverted triangle
wtable = [math.fabs(i) for i in frange(size, highval, lowval - highval)] # Only really a triangle wave when centered on zero
elif wtype == "tri":
wtable = [ (2.0 / (size + 1)) * ((size + 1) / 2.0 - math.fabs(i - ((size - 1) / 2.0))) for i in range(size) ]
elif wtype == "saw" or wtype == "line":
wtable = [i for i in frange(size, highval, lowval)]
elif wtype == "phasor":
wtable = wavetable("line", size, highval, lowval)
list.reverse(wtable)
elif wtype == "impulse":
wtable = [float(randint(-1, 1)) for i in range(size / randint(2, 12))]
wtable.extend([0.0 for i in range(size - len(wtable))])
elif wtype == "vary":
if size < 32:
bsize = size
else:
bsize = size / int(rand(2, 16))
btable = [ [wave_types[int(rand(0, len(wave_types)-1))], rand(lowval, highval)] for i in range(bsize) ]
if len(btable) > 0:
btable[0] = lowval
else:
btable = [lowval]
wtable = breakpoint(btable, size)
elif wtype == "flat":
wtable = [highval for i in range(size)]
return wtable
def stf(s, r=None):
if r is not None:
s = rand(s, r)
ms = s * 1000.0
return mstf(ms)
