What are the units of a .wav file? I am working on calibrating my recording system. I have a signal generator playing a 500mVpp sine wave signal into my utrack24 recorder. I am trying to determine what the units of the recorded utrack .wav file is so I can compare that to the input signal. I have read the .wav file into matlab with audioread. I can use either the normalized version of the file or the 'native' version; I'm not sure which is better.
Once an audio signal has been digitalized, it has no units and it is treated as a number. 

You could use dBFS (decibels relative to full scale) as unit, though. The value of 0 dBFS represents the maximum digital signal level.