如何检测已录制声音样本的音高

Question

I'd like to analyze a piece of a recorded sound sample and find it's properties like pitch and so. I have tried to analyze the recorded bytes of the buffer with no success. How it can be done?

Answer 1

Use fast Fourier transform.. Libraries available for most languages. Bytes are no good, can be mp3 encoded or wav/pcm.. You need to decide then analyze.

DG

Answer 2

You will have to look into FFM .

Then do something like this pseudocode indicates :

Complex in[1024];
Complex out[1024];
Copy your signal into in
FFT(in, out)
for every member of out compute sqrt(a^2+b^2)
To find frequency with highest power scan for the maximum value in the first 512 points in out

Check also out the original post of the buddy here because it is probably a duplicate.