Hey LabVIEW'ers,
I'm having an audio signal as input. Next, I'm performing an FFT (power spectrum). My task is to "delete" some frequencies which meet certain criteria (not discussed here). After that, I have to invert FFT back to a sound wave. I have the following questions:
- What kind of FFT is suited best for my goal (Power Spectrum, Complex, Magnitude/Phase)?
- I'm performing a peak-search and those peaks who meet the "criteria" will be set to zero. Is this the correct way to "delete frequencies"? It kinda feels unprofessional to just set them to zero...
- I've tried several methods, but the inverse FFT always results in nosense waveforms. They should look similar to the input. I guess I'm missing the Phase at the inverse transform? Also, the time-scale doesn't correspond with the input.
Any hints are appreciated. If you need further explaination, just let me know.
