---------------------------- Original Message ---------------------------- Subject: Re: [music-dsp] Choosing the right DSP, what things to look out for? From: "Ross Bencina" <rossb-li...@audiomulch.com> Date: Wed, August 24, 2016 11:18 pm To: music-dsp@music.columbia.edu -------------------------------------------------------------------------- > 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. and they will likely have some instructions that are optimized for doing butterflies and doing bit-reversed addressing. > 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). usually when i think of audio effects or synthesis and a DSP chip, i think "real time" and "live". �but i don't usually think "live" and "FFT" going together, unless it's a convolutional reverb, and it's the part of the reverb impulse response that is the delayed part. �can't really do a 4096 point FFT without first reading in 4096 samples. �could be 100 ms in doing that. -- r b-j � � � � � � � � � � �r...@audioimagination.com "Imagination is more important than knowledge."
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