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Hello all,
I am trying to interpolate a audio signal. I tried with linear interpolation and before that I
tried with adding zero sample interpolation, but both giving noise in the output audio file.
Now I want to try cubic interpolation. But I don't know the mathematics of the cubic
interpolation and I want to write a code (in scilab or c). Can anybody give  me idea how to
write a code which can interpolate a audio signal using cubic interpolation? Also if anybody
tell me the basic of cubic interpolation that is also very helpfull to me.
I have audio raw file and I am reading 8bit data from that file and after interpolating it I am
storing the result into one raw file. I have player for raw audio file so I can adjust the
sampling frequency.
Thanks and regards
	

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