what is the code to apply filters (lowpass and highpass) for signals read?

y=wavread(filename); wavplay(y,11025); wavwrite(y,11025,filename);

Answer 1

[Amith Kamath]

Assuming you have the Signal Processing Toolbox installed, you could use the FDA Tool to specify the parameters for your filter. Some info is here: http://www.mathworks.com/help/signal/examples/introduction-to-the-filter-design-and-analysis-tool-fdatool.html

Now that you have the required characteristics, export it to the workspace, and operate it on y using http://www.mathworks.com/help/matlab/ref/filter.html.