If I understand the fft files correctly OOURA is now the default, but 'disguised' as mayer fft so the old API should remain valid. (http://sourceforge.net/p/pure-data/pure-data/ci/master/tree/src/d_fft_fftsg.c).
Indeed I get the same result for Matt's test patch with Pd 0.46-5 which is on my system. Sinusoids for block size 8 and 16, instead of spectrum points. A while ago I've been reading in OOURA fft code and what I remember is, Pd uses its mixed radix functions. Not sure about it though. Katja On Fri, Oct 16, 2015 at 10:00 PM, Robert Esler <[email protected]> wrote: > > As far as I know Pd stopped using the mayer fft library in .46, which is > probably why this is new behavior. I only get what you’re experiencing with > a block size of 8. Otherwise, it seems to perform as expected. > To really understand if this is a bug or not is to know which fft library > is being used for OS X. My guess is it’s the OOURA but it’s not clear from > looking at [fft~] object code that comes with distribution. > You could also download the old library and recompile Pd, but I doubt it’s > worth it. > -Rob > ------- > Hi list, > > There's either a major bug in the [fft~] objects in Pd-0.46.7 (64bit OSX) > or I'm going crazy. I'd love to see if others can reproduce it. > > Basically, for [block~] sizes less than 32 bits, [fft~] doesn't perform -- > it just passes the signal through unchanged. [ifft~] does the same. The > [rfft~]-[rifft~] is a little more complicated -- it passes signal through > but zeroes out the last N/2 for [block~] sizes less than 64. > > > See the attached patch, which only shows [fft~]. The saved contents of the > tables on opening are the results for [block~ 8] on my machine, for > quarter-nyquist at 44100. > > I've never seen this before in other versions of Pd. Anyone else get this > behavior? > > Matt > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
