1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
|
"""
Tools to analyze audio signals.
These objects are designed to retrieve specific informations
from an audio stream. Analysis are sent at audio rate, user
can use them for controlling parameters of others objects.
"""
"""
Copyright 2010 Olivier Belanger
This file is part of pyo, a python module to help digital signal
processing script creation.
pyo is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
pyo is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with pyo. If not, see <http://www.gnu.org/licenses/>.
"""
from _core import *
from _maps import *
class Follower(PyoObject):
"""
Envelope follower.
Output signal is the continuous mean amplitude of an input signal.
Parentclass: PyoObject
Parameters:
input : PyoObject
Input signal to process.
freq : float or PyoObject, optional
Cutoff frequency of the filter in hertz. Default to 20.
Methods:
setInput(x, fadetime) : Replace the `input` attribute.
setFreq(x) : Replace the `freq` attribute.
Attributes:
input : PyoObject. Input signal to process.
freq : float or PyoObject. Cutoff frequency of the filter.
Notes:
The out() method is bypassed. Follower's signal can not be sent to
audio outs.
Examples:
>>> s = Server().boot()
>>> s.start()
>>> sf = SfPlayer(SNDS_PATH + "/transparent.aif", loop=True, mul=.4).out()
>>> fol = Follower(sf, freq=30)
>>> n = Noise(mul=fol).out(1)
"""
def __init__(self, input, freq=20, mul=1, add=0):
PyoObject.__init__(self)
self._input = input
self._freq = freq
self._mul = mul
self._add = add
self._in_fader = InputFader(input)
in_fader, freq, mul, add, lmax = convertArgsToLists(self._in_fader, freq, mul, add)
self._base_objs = [Follower_base(wrap(in_fader,i), wrap(freq,i), wrap(mul,i), wrap(add,i)) for i in range(lmax)]
def __dir__(self):
return ['input', 'freq', 'mul', 'add']
def setInput(self, x, fadetime=0.05):
"""
Replace the `input` attribute.
Parameters:
x : PyoObject
New signal to process.
fadetime : float, optional
Crossfade time between old and new input. Default to 0.05.
"""
self._input = x
self._in_fader.setInput(x, fadetime)
def setFreq(self, x):
"""
Replace the `freq` attribute.
Parameters:
x : float or PyoObject
New `freq` attribute.
"""
self._freq = x
x, lmax = convertArgsToLists(x)
[obj.setFreq(wrap(x,i)) for i, obj in enumerate(self._base_objs)]
def out(self, chnl=0, inc=1, dur=0, delay=0):
return self
def ctrl(self, map_list=None, title=None, wxnoserver=False):
self._map_list = [SLMap(1., 500., 'log', 'freq', self._freq)]
PyoObject.ctrl(self, map_list, title, wxnoserver)
@property
def input(self):
"""PyoObject. Input signal to process."""
return self._input
@input.setter
def input(self, x): self.setInput(x)
@property
def freq(self):
"""float or PyoObject. Cutoff frequency of the filter."""
return self._freq
@freq.setter
def freq(self, x): self.setFreq(x)
class Follower2(PyoObject):
"""
Envelope follower with different attack and release times.
Output signal is the continuous mean amplitude of an input signal.
Parentclass: PyoObject
Parameters:
input : PyoObject
Input signal to process.
risetime : float or PyoObject, optional
Time to reach upward value in seconds. Default to 0.01.
falltime : float or PyoObject, optional
Time to reach downward value in seconds. Default to 0.1.
Methods:
setInput(x, fadetime) : Replace the `input` attribute.
setRisetime(x) : Replace the `risetime` attribute.
setFalltime(x) : Replace the `falltime` attribute.
Attributes:
input : PyoObject. Input signal to process.
risetime : float or PyoObject. Time to reach upward value in seconds.
falltime : float or PyoObject. Time to reach downward value in seconds.
Notes:
The out() method is bypassed. Follower's signal can not be sent to
audio outs.
Examples:
>>> s = Server().boot()
>>> s.start()
>>> sf = SfPlayer(SNDS_PATH + "/transparent.aif", loop=True, mul=.4).out()
>>> fol2 = Follower2(sf, risetime=0.002, falltime=.1, mul=.5)
>>> n = Noise(fol2).out(1)
"""
def __init__(self, input, risetime=0.01, falltime=0.1, mul=1, add=0):
PyoObject.__init__(self)
self._input = input
self._risetime = risetime
self._falltime = falltime
self._mul = mul
self._add = add
self._in_fader = InputFader(input)
in_fader, risetime, falltime, mul, add, lmax = convertArgsToLists(self._in_fader, risetime, falltime, mul, add)
self._base_objs = [Follower2_base(wrap(in_fader,i), wrap(risetime,i), wrap(falltime, i), wrap(mul,i), wrap(add,i)) for i in range(lmax)]
def __dir__(self):
return ['input', 'risetime', 'falltime', 'mul', 'add']
def setInput(self, x, fadetime=0.05):
"""
Replace the `input` attribute.
Parameters:
x : PyoObject
New signal to process.
fadetime : float, optional
Crossfade time between old and new input. Default to 0.05.
"""
self._input = x
self._in_fader.setInput(x, fadetime)
def setRisetime(self, x):
"""
Replace the `risetime` attribute.
Parameters:
x : float or PyoObject
New `risetime` attribute.
"""
self._risetime = x
x, lmax = convertArgsToLists(x)
[obj.setRisetime(wrap(x,i)) for i, obj in enumerate(self._base_objs)]
def setFalltime(self, x):
"""
Replace the `falltime` attribute.
Parameters:
x : float or PyoObject
New `falltime` attribute.
"""
self._falltime = x
x, lmax = convertArgsToLists(x)
[obj.setFalltime(wrap(x,i)) for i, obj in enumerate(self._base_objs)]
def out(self, chnl=0, inc=1, dur=0, delay=0):
return self
def ctrl(self, map_list=None, title=None, wxnoserver=False):
self._map_list = [SLMap(0.001, 1., 'log', 'risetime', self._risetime)]
PyoObject.ctrl(self, map_list, title, wxnoserver)
@property
def input(self):
"""PyoObject. Input signal to process."""
return self._input
@input.setter
def input(self, x): self.setInput(x)
@property
def risetime(self):
"""float or PyoObject. Time to reach upward value in seconds."""
return self._risetime
@risetime.setter
def risetime(self, x): self.setRisetime(x)
@property
def falltime(self):
"""float or PyoObject. Time to reach downward value in seconds."""
return self._falltime
@falltime.setter
def falltime(self, x): self.setFalltime(x)
class ZCross(PyoObject):
"""
Zero-crossing counter.
Output signal is the number of zero-crossing occured during each
buffer size, normalized between 0 and 1.
Parentclass: PyoObject
Parameters:
input : PyoObject
Input signal to process.
thresh : float, optional
Minimum amplitude difference allowed between adjacent samples
to be included in the zeros count.
Methods:
setInput(x, fadetime) : Replace the `input` attribute.
setThresh(x) : Replace the `thresh` attribute.
Attributes:
input : PyoObject. Input signal to process.
thresh : float. Amplitude difference threshold.
Notes:
The out() method is bypassed. ZCross's signal can not be sent to
audio outs.
Examples:
>>> s = Server(duplex=1).boot()
>>> s.start()
>>> a = SfPlayer(SNDS_PATH + "/transparent.aif", loop=True, mul=.4).out()
>>> b = ZCross(a, thresh=.02)
>>> n = Noise(b).out(1)
"""
def __init__(self, input, thresh=0., mul=1, add=0):
PyoObject.__init__(self)
self._input = input
self._mul = mul
self._add = add
self._thresh = thresh
self._in_fader = InputFader(input)
in_fader, thresh, mul, add, lmax = convertArgsToLists(self._in_fader, thresh, mul, add)
self._base_objs = [ZCross_base(wrap(in_fader,i), wrap(thresh,i), wrap(mul,i), wrap(add,i)) for i in range(lmax)]
def __dir__(self):
return ['input', 'thresh', 'mul', 'add']
def setInput(self, x, fadetime=0.05):
"""
Replace the `input` attribute.
Parameters:
x : PyoObject
New signal to process.
fadetime : float, optional
Crossfade time between old and new input. Default to 0.05.
"""
self._input = x
self._in_fader.setInput(x, fadetime)
def setThresh(self, x):
"""
Replace the `thresh` attribute.
Parameters:
x : float
New amplitude difference threshold.
"""
self._thresh = x
x, lmax = convertArgsToLists(x)
[obj.setThresh(wrap(x,i)) for i, obj in enumerate(self._base_objs)]
def out(self, chnl=0, inc=1, dur=0, delay=0):
return self
def ctrl(self, map_list=None, title=None, wxnoserver=False):
self._map_list = []
PyoObject.ctrl(self, map_list, title, wxnoserver)
@property
def input(self):
"""PyoObject. Input signal to process."""
return self._input
@input.setter
def input(self, x): self.setInput(x)
@property
def thresh(self):
"""float. Amplitude difference threshold."""
return self._thresh
@thresh.setter
def thresh(self, x): self.setThresh(x)
|
