Mu-law to linear conversion.
Y = MU2LIN(MU) converts mu-law encoded 8-bit audio signals,
stored as "flints" in the range 0 <= MU <= 255, to
linear signal amplitude in the range -s < Y < s where
s = 32124/32768 ~= .9803. The input MU is often obtained
using fread(...,'uchar') to read byte-encoded audio files.
"Flints" are MATLAB's integers -- floating point numbers
whose values are integers.
See also LIN2MU61BFZAG, AUREAD .