How to put wav file as input argument of a function ?

Hi everyone, my problem is how to put wav file as input argument of a function

function[]=down4up4_nofilt(Songbird.wav,Songbird.wav);

There is error in this line of code. The error is happened at the 2 dots in front of wav. And MATLAB error commend is "Possibly, a ) or } or } is missing."

Please help me solve this problem. Thank you,

Jimmy

Answer 1

[W. Owen Brimijoin]

You need to load the signal that's in the file 'Songbird.wav' into the Matlab workspace first:

stimulus = audioread('Songbird.wav');
output = down4up4_nofilt(stimulus,stimulus);