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overlapping vDsp FFT

Subject: overlapping vDsp FFT
From: gary <email@hidden>
Date: Fri, 23 Mar 2007 09:48:37 +0900 (JST)
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Hi

Im fairly new to using vDSP, does anyone know how to
go about overlapping successive blocks of FFT audio data,
prior to IFFT, im coming unstuck dealing with the out of order
nature of vDSPs FFT format ie:

fft_zrip(setupReal, &block, 1, 10, FFT_FORWARD )

next block, add/overlap with prev FFT.. repeat x
......

thanks for any tips
Gary

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