Reading in with WAV yields different result from data exported through Audacity

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I ended up exporting the data out to CSV to inspect it and it seems there were zeros in there.

using DelimitedFiles
writedlm( "FileName.csv",  data, ',')

I had forgotten that when I originally exported the data using Audacity they were [inf] data points, which I had corrected manually. That’s why it was working up to the squaring step, but not the log step, because obviously log10(0) is undefined.

So the solution is:

dataRead, fs = wavread("FileName.wav")
data = dataRead[:]
dataLength = length(data)

    for i in 1:dataLength
        if data[i] != 0

            data[i] = 10*(log10(data[i]^2)) #converts to dB
           #dataTop[i] = 20*log10(abs(data[i])) #alternative way to convert to dB, see upthread
           else data[i] = 0  #zeros are okay in the dB data for me

         end
     end

That should work as expected now.