Not sure if this helps but there is a very good tutorial on the FFT at
http://www.dspdimension.com/admin/dft-a-pied/
HTH,
--th
2008/8/3 Francois Baronnet <email@hidden>:
> Hi all,
> I'm willing to develop some tuning tool (guitar & ukulele) for iPhone.
> I'm facing some issues with the record part: I'd like to record sound for 2
> or 3 seconds (this part is ok) and then extract from it the principal
> frequency.
> Some people said to me to compute the Fast Fourier Transform.
> Reading this mailing list I found how to find sound data chunks in some AIFF
> file
> (here: http://lists.apple.com/archives/coreaudio-api/2003/Feb/msg00244.html).
> But one point is missing: in all theses chunks of sound, what do I should
> send to my FFT function? I heard of arrays of complex numbers, but I'm a bit
> confused...
> Thanks in advance for any help.
> --
> François Baronnet
>
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
