Filter design for audio signal.
- by beanyblue
What I am trying to do is simple. I have a few .wav files. I want to remove noise and filter out specific frequencies. I don't have matlab and I intend to write my own code for all the filters.
Right now, I have a way to read the .wav file and dump out the structure into a text file.
My questions are the following:
Can I directly apply the digital
filters on this sampled data?{ ie,
can I directly do a convolution
between my input samples and h(n)
for the filter function that i
choose?).
How do I choose the
number of coefficients for the
Window function?
I have octave, so if someone can point me to anything that gives me some idea on how to process the .wav file using octave, that would be great too. I want to be able to filter out the frequency and then listen to the sound again. Is this possible with octave?
I'm just a beginner with these kinds of things, so please bear with me if my questions are too naive.
Any help will be great.
