Audio signal max/average amplitude

Hello, I suppose this is an easy question for some. Can anyone provide me with matlab coding on finding max amplitude/max samples/average amplitudes/amplitude range from a .wav audio signal?

Thank you in advance

[Jan]

What have you tried so far and which problems occur?

[Azimah]

I tried to get some clues on the internet but I found nothing regarding this matter.

[Walter Roberson]

First you have to define what you mean by "amplitude". See another related question from earlier today: http://www.mathworks.com/matlabcentral/answers/21825-what-is-amplitudes-of-a-wav-signal

[Azimah]

I'm trying to get the max/average amplitude in terms of the voltage that pass by the microphone to the 'line in' connector.

Answer 1

[Rick Rosson]

   >> doc wavread
   >> doc max
   >> doc min
   >> doc mean

[Walter Roberson]

The 'native' option of wavread() will likely be desired.

Voltage calculation would be assisted by reference to http://en.wikipedia.org/wiki/Line_level#Nominal_levels