How to add a filtered random noise to a wav

Hi, I am very new to Matlab and i have this problem: I have to generate a random noise , then filter it with a low pass filter, then add it to a wav. this is all i know how to do..

[s,fe,bits]=wavread('semnalUtil'); sound(s,fe)

Answer 1

[Sean de Wolski]

Look at the app fdatool to build the filter and randn to generate random noise.