AAC | ADPCM | Convolution | DAFx | FFT | IIR | Mixer | MP3 | MPEG | MPEG-4

Does anyone out there have experience or info in how to construct 
fractional-octave bandwidth filters using FFTs? It does not seem to 
be an accepted method, yet I cannot understand why.

The typical (ANSI S1.11-1986 approved) method uses digital IIR 
filters in the time domain. I'm interested in a FFT implementation to 
enable processing of short (transient) signals that are obscured by 
the settling time of the IIRs. My application allows post-processing 
(i.e., non-real time) of the data.

Issues in the FFT approach (conceptually, by summing power in 
adjacent bins) include window selection, zero-padding, how to handle 
power in partial bins, etc.

Thanks
	

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