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Well, 514 is close enough to a power of two, when a floating point number crosses a power of two it looses one digit accuracy. The floating point number will be stored with 24-bit mantissa. Your sum will be around $2^{15}$, when the sum is less than $2^{15}$, your input will be accumulated with precision $2^{14-24}=2^{-10}$, if the sum accumulator is greater ...


0

If you know the reference input you might reverse engineer codec behaviour by trying all different codecs at all different bitrates until one matched. Or you might se telltale signs (rectangular patches in the frequency domain where energy is just above/bellw the threshold of being/not being transmitted) of a filterbank that is known to be used for one ...


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