How do I use correlation coefficients with two audio samples?

Hi, I spectrally analysed a machine gun burst sample and used a spectral modelling synthesis model in Max/MSP to procedurally generate it in real-time and now I'm wanting to use correlation to see how close I got. Due to lack of knowledge in MATLAB I'm looking for a little help to gain my metric. I have attached the audio files

A = "Machine_Gun_Burst.wav";
B = "Dry_Synthesized_Machine_Gun_Burst.wav";
R = corrcoef(A,B);

This was my failed attempt and i got the below error message:

Error using corrcoef>getparams (line 296)

Unmatched parameter name/value pair.

Error in corrcoef (line 119)

[alpha,userows] = getparams(varargin{:});