wavfile.read in scipy on beaglebone does not return expected output

I use python on beaglebone and when I run scipy.io.wavfile.read() on a .wav file, instead of returning numpy array of integers, it returns string with one or two elements.So, furthur processing becomes impossible. But the same program with the above wave file worked fine on ubuntu, which returned expected array output. So, it is not the problem with audio file or the program. Is there anything else I should configure on beaglebone? I installed scipy, numpy and all the packages I use to run the program in ubuntu. Please help.

Source: ubuntu

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