[PD] FFT convolution with vasp

[Kevin McCoy]

Wow, didn't know it was that simple.  I'll give it a shot later and report
back.  Thanks!

K

On 2/3/07, Thomas Grill <gr at grrrr.org> wrote:
>
> Hi Kevin,sorry for not anwering earlier - i'm abroad an not very netty at
> the moment.
> VASP offers non-granular Fourier transformation, which enables
> non-windowed convolution.
> Convolution translates to multiplication in the spectral domain, therefore
> just  fourier-transform your two buffers (zero-padded to the same size) into
> the spectral domain, multiply the results, transform back, there you go.
>
> greetings,
> Thomas
>
>
> Am 02.02.2007 um 19:42 schrieb Kevin McCoy:
>
> Hello all,
>
> I would like to hear how some FFT-based convolution sounds with VASP,
> which claims to leave fewer artifacts than the hann-windowed realtime FFT,
> but the included example "convolution" does not produce results for me - I
> load the sound files and send them to the tables via wedit but the final
> table (I think it's called buf_res) does not receive anything - in other
> words, no results.
>
> I'm looking to do something like the "timbre stamp" FFT example in Pd's
> documentation - I've gotten so many wild and beautiful sounds from running
> tabread4~ based samples against each other through this, but the quality is
> not always very crisp.  If anyone has any patches or info, let me know.
>
> Thanks!
> Kevin
>
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>
>
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