How to divide wav file to frames (windows) with specific number of samples and plot time waveform and frequency spectrum using Matlab

I have wav file x with duration 10 seconds and sampling frequency 48kHz. How can I plot the time waveform showing only 1024 (or 2048) points? I guess I need to divide the file to frames, so after I should be able to "scroll" through the length of the audio and be able to see matching time waveform and frequency spectrum with the particular needed number of points. I wrote the code for the entire wav file, but I don`t know how to show specific area.

Thank you in advance!

Answer 1

[Azzi Abdelmalek]

If y is your audio signal, if you want to get the 10000 first samples

out=y(1:10000)

Read the documentation http://www.mathworks.com/help/matlab/indexing.html