If you do your work using MATLAB it will be seem easy to manipulate your work, you can find complete details about audio processing using MATLAB on following link.

http://www.mathworks.in/help/matlab/ref/audioread.html

thanx Pankaj Sir...  i will chek it

can i work on audio from input (recorded) word to text ...... how to implement this in MATLAB 

You could try something like:

• http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html

But what you are attempting is extremely(!) challenging...

Thnks Pete R Jones  sir

Look for a DSP (digital signal processing) kit or library, I believe there is one available in Matlab.

Thank   Ion Laurentiu Tobos  Sir