问题
How can I get(Is it possible?) all audio frequencies are now playing in the system for writing some sound visualizer? Is there any library c++ or c#? Thanks in advance
回答1:
Basic steps are:
- apply window function to block of samples (e.g. 1024 samples, Hanning window)
- perform real-to-complex FFT on windowed samples
- take magnitude of each FFT output bin (
sqrt(re * re + im * im)) - identify peaks in resulting power spectrum estimate
- the bin index of each peak corresponds to the frequency of that component
回答2:
I am not sure, but i think you can use FMOD library to do that. Specifically, Get spectrum function.
来源：https://stackoverflow.com/questions/2613009/all-audio-frequencies