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I’m trying to get input from plug-in guitar, get the frequency from it and check whether the users is playing the right note or not. Something like a guitar tuner (I’ll need to do a guitar tuner as well).
My first question is, how can I get the frequency of guitar input in real time?
and is it possible to do something like :
if (frequency == noteCFrequency)
{
//print This is a C note!!
}
I’m now able to get input from the soundcard, record and playback the input sound already.
You must compute the FFT -Fast Fourier Transform- of a piece of signal and look for a peak. For kinds of FFT, window type, window size… you must read some documentation regarding signal processing. Anyway a 25 ms window is OK and use a Hamming window, for example. On the net there is lot of code for computing FFT. Good luck!