Hello,
I am attempting to create a .wav file from an array in sage using the
package wavfile. I am importing a .wav file using the package
wavfile, and then using the python wavelets package 'pywt' to create
the array. Here are the commands:
import pywt, scipy, numpy
from scipy.io import wavfile
x=wavfile.read('/directory/file.wav')
(cA, cD)=pywt.dwt(x[1],'db1')
xnew=pywt.idwt(cA,cD,'db1')
wavfile.write("noisyholanew.wav",44100, xnew)
The last command generates the following error message:
------------------------------------------------------------------
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_23.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding:
utf-8 -*-\\n" +
_support_.preparse_worksheet_cell(base64.b64decode("d2F2ZmlsZS53cml0ZSgibm9pc3lob2xhbmV3LndhdiIsNDQxMDAsIHhuZXcp"),globals())
+"\\n"); execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmpJPm6LZ/___code___.py", line 3, in <module>
exec
compile(u'wavfile.write("noisyholanew.wav",_sage_const_44100 , xnew)
File "", line 1, in <module>
File "/home/jeremy/Programs/sage-4.5.3/local/lib/python2.6/site-
packages/scipy/io/wavfile.py", line 99, in write
fid.write(struct.pack('ihHIIHH', 16, 1, noc, rate, sbytes, ba,
bits))
SystemError: Objects/longobject.c:336: bad argument to internal
function
noisyholanew.wav
-------------------------------------------------------------------
xnew is the array. type(xnew) returns <type 'numpy.ndarray'>.
When I run this series of commands in a python shell, I receive no
error, and a .wav file is generated.
I would like to be able to run this series of commands in sage as
well.
I am using Sage 4.5.3 (compiled from source) and Python 2.6.4 on
Ubuntu 9.10.
Thanks!
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