Hi guys,
I'm trying to make a specgram() for some wave samples that I have
read into 'data' using pyaudiolab's read_frames() (put into wavread())
When I do
from wavread import *
from pylab import *
from statistics import *
data, datasize, samplerate, channels = wavread("myfile.wav")
specgram(data)
I get:
Warning: divide by zero encountered in log10
(array([[ 2.26730611e-02, 1.51890672e-02, 7.78123371e-03, ...,
0.e+00, 0.e+00, 0.e+00],
[ 9.11969843e-03, 2.81931459e-03, 3.13995580e-03, ...,
0.e+00, 0.e+00, 0.e+00],
[ 7.25346631e-04, 4.83291216e-05, 2.59076878e-04, ...,
0.e+00, 0.e+00, 0.e+00],
...,
[ 5.19279887e-08, 1.53242938e-07, 1.46461798e-07, ...,
0.e+00, 0.e+00, 0.e+00],
[ 1.00769359e-07, 2.00314891e-07, 3.04618029e-07, ...,
0.e+00, 0.e+00, 0.e+00],
[ 2.86252093e-08, 5.42052713e-07, 1.50494595e-07, ...,
0.e+00, 0.e+00, 0.e+00]]),
array([ 0. , 0.0078125, 0.015625 , 0.0234375, 0.03125 ,
0.0390625, 0.046875 , 0.0546875, 0.0625 , 0.0703125,
0.078125 , 0.0859375, 0.09375 , 0.1015625, 0.109375 ,
0.1171875, 0.125, 0.1328125, 0.140625 , 0.1484375,
0.15625 , 0.1640625, 0.171875 , 0.1796875, 0.1875 ,
0.1953125, 0.203125 , 0.2109375, 0.21875 , 0.2265625,
0.234375 , 0.2421875, 0.25 , 0.2578125, 0.265625 ,
0.2734375, 0.28125 , 0.2890625, 0.296875 , 0.3046875,
0.3125 , 0.3203125, 0.328125 , 0.3359375, 0.34375 ,
0.3515625, 0.359375 , 0.3671875, 0.375, 0.3828125,
0.390625 , 0.3984375, 0.40625 , 0.4140625, 0.421875 ,
0.4296875, 0.4375 , 0.4453125, 0.453125 , 0.4609375,
0.46875 , 0.4765625, 0.484375 , 0.4921875, 0.5 ,
0.5078125, 0.515625 , 0.5234375, 0.53125 , 0.5390625,
0.546875 , 0.5546875, 0.5625 , 0.5703125, 0.578125 ,
0.5859375, 0.59375 , 0.6015625, 0.609375 , 0.6171875,
0.625, 0.6328125, 0.640625 , 0.6484375, 0.65625 ,
0.6640625, 0.671875 , 0.6796875, 0.6875 , 0.6953125,
0.703125 , 0.7109375, 0.71875 , 0.7265625, 0.734375 ,
0.7421875, 0.75 , 0.7578125, 0.765625 , 0.7734375,
0.78125 , 0.7890625, 0.796875 , 0.8046875, 0.8125 ,
0.8203125, 0.828125 , 0.8359375, 0.84375 , 0.8515625,
0.859375 , 0.8671875, 0.875, 0.8828125, 0.890625 ,
0.8984375, 0.90625 , 0.9140625, 0.921875 , 0.9296875,
0.9375 , 0.9453125, 0.953125 , 0.9609375, 0.96875 ,
0.9765625, 0.984375 , 0.9921875, 1. ]), array
([ 6.4000e+01, 1.2800e+02, 1.9200e+02, ...,
9.7344e+04, 9.7408e+04, 9.7472e+04]),
)
For another sample, I get a nice spectrogram. What can it be about my
sample that would give me such an error? What is the error caused by?
A Google on the error message provided me with nothing.
Sincerely yours
Niklas Saers-
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