[scitools] push by oyvind.r...@gmail.com - added fundtions for playing a sound with noise, or in reverse order on 2014-02-06 10:44 GMT

[scit...@googlecode.com]

Revision: 7fccac907d4d
Branch: default
Author: oyvind.ryan
Date: Thu Feb 6 10:42:45 2014 UTC
Log: added fundtions for playing a sound with noise, or in reverse
order
http://code.google.com/p/scitools/source/detail?r=7fccac907d4d

Modified:
/lib/scitools/sound.py

=======================================
--- /lib/scitools/sound.py Thu Feb 6 09:37:18 2014 UTC
+++ /lib/scitools/sound.py Thu Feb 6 10:42:45 2014 UTC
@@ -72,6 +72,26 @@
# assume windows
os.system('start %s' %tmpfile)

+def playreverse():
+ """
+ Play the sound backwards
+ """
+ data,sample_rate=read('tmp.wav')
+ m,n=shape(data)
+ play(data[m:0:(-1),:],sample_rate)
+
+def playnoise(c):
+ """
+ Play the sound with noise added. c represens the noise level
+ """
+ data,sample_rate=read('tmp.wav')
+ m,n=numpy.shape(data)
+ data=data.astype(float)
+ data=data+c*(2**15-1)*(2*numpy.random.rand(m,n))
+ data=(2**15-1)*data/abs(data).max()
+ data=data.astype(numpy.int16)
+ play(data,sample_rate)
+
def note(frequency, length, amplitude=1, sample_rate=44100):
"""
Generate the sound of a note as an array if float elements.
@@ -98,8 +118,8 @@
tone3 = max_amplitude*note(440, 1, 0.8)
data = numpy.concatenate((tone1, tone2, tone3))
write(data, 44100, filename)
- data,fs = read(filename)
- play(filename)
+ data,sample_rate = read(filename)
+ play(data,sample_rate)

def Nothing_Else_Matters(echo=False):
E1 = note(164.81, .5)
@@ -275,4 +295,4 @@
if __name__ == '__main__':
#_test1()
song = Nothing_Else_Matters(False)
- play(song)
+ play(song,44100)