up sampling a wave file in MATLAB

hiii,

i want to up sample a wave file in matlab...but couldnt get it right can anyone help???

Answer 1

[Wayne King]

I assume by upsampling you mean inserting zeros to increase the sampling rate and applying the interpolation filter.

Have you tried resample.m in the Signal Processing Toolbox?

    % Original sampling rate is 1000 Hz
    t = 0:0.001:1-0.001;
    x = cos(2*pi*100*t);
    % resample at twice the original rate
    y = resample(x,4,2);

If this does not help you, it would be helpful for you to post some code to show where you are having trouble.