MATLAB: How to calculate rms of an audio file

rmsstereo audio

Having an audio file with unknown number of channels (may be stereo, may be mono), how do I calculate rms of each channel, please?

Signal = audioread(FileName);
RMS    = sqrt(mean(Signal.^2, 1))

I gave an answer today that required an RMS calculation.

You can make a throw-away function for RMS:

RMS = @(x) sqrt(mean(x.^2));

And then to answer your question:

signal = signal / RMS(signal);

mfcc does not appear to be part of MATLAB. It appears to be a routine from the File Exchange . You will need to download it and install it.