To tune automaticaly a standard guitar...

[wahwah]

... need to identify and compare the input data with the stored one. Is this realizable with b4p?

Sub
If ^ = yes then how
End Sub

ThxInAdvc

[Erel]

We need some more information. Where does the input data come from? How does it look? What is the stored data?

[wahwah]

sure, well, as input data i mean the played note e.g.: on a guitar, received from my device over the microphone and of course as stored data i mean the saved *.wav or *.mp3 or whatever files to compare with the received one.

The device sould finally emulate an autotuner device for music instruments.

[LineCutter]

Harmonics & local acoustics would play havoc with comparison to a .wav. I suspect that you'd need to do some interesting maths to find the main underlying frequency of your note & then see if it was close enough to call "in tune".

Anyone fancy writing FFT.dll>

[wahwah]

yes LineCutter, You hit it. Exactly that what i mean but, i search in vain till yet for the "fft.dll". Could You please spacify me where to find it.

Cheers

[LineCutter]

Generally agraham writes something that does 4 times the things required, including things you haven't yet thought of, in about 30 minutes from.... now


AFAIK there is no fft.dll for B4PPC

[wahwah]

Well LineCutter, then let us cut the line and wait for the opportunity.

[LineCutter]

FFT, although not in B4PPC

CodeProject: How to implement the FFT algorithm. Free source code and programming help

& slightly related, but possibly easier to comprehend some of the issues.

Pitch Shifting Using The Fourier Transform - The DSP Dimension