On 25/08/2016 8:44 AM, Max K wrote:
How important do you reckon FFT hardware acceleration [is] when choosing the DSP?
Most (all?) DSPs will be somewhat optimised for performing FFTs. They may not have special FFT hardware, but the vendor will most likely provide an optimised FFT library.
Fourier domain spectral processing is not a particularly mainstream technique for digital audio effects, but it's certainly a fruitful area if you want to go in that direction. (Michael Norris' plugins come to mind as an example of nice things that you can do in the spectral domain http://www.michaelnorris.info/software/soundmagic-spectral).
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