I'am pretty new to this topic so i dont have much experience with DSP. I want to filter(highpass) a WAVE file, i have already programmed the FFT, and now want to filter the FFT vector via convolution (which is a multiplication in frequency domain ?!).
1) Can anyone give me an easy equation for such a filter?
2) If i have an equation i compute it, also Fourier-Transform it, an multiply it with my FFT vector and inverse Transform it an i have applied the filter?!