<![CDATA[Problem with fft example in Pd tutorial]]>There is a problem with Pure Data patch "3.8.1.1. rfft array" on this page.

When I run the patch, I get a second peak off the edge of the graph, as you can see in the attached image. I'm using Pd 0.55.0. Is this a problem with the patch or with Pure Data? What's the fix?
rfft_problem.JPG

]]>http://forum.pdpatchrepo.info/topic/14805/problem-with-fft-example-in-pd-tutorialRSS for NodeSat, 16 May 2026 18:23:19 GMTMon, 22 Jul 2024 23:06:07 GMT60<![CDATA[Reply to Problem with fft example in Pd tutorial on Mon, 22 Jul 2024 23:06:07 GMT]]>There is a problem with Pure Data patch "3.8.1.1. rfft array" on this page.

When I run the patch, I get a second peak off the edge of the graph, as you can see in the attached image. I'm using Pd 0.55.0. Is this a problem with the patch or with Pure Data? What's the fix?
rfft_problem.JPG

]]>http://forum.pdpatchrepo.info/topic/14805/problem-with-fft-example-in-pd-tutorialhttp://forum.pdpatchrepo.info/topic/14805/problem-with-fft-example-in-pd-tutorialMon, 22 Jul 2024 23:06:07 GMT<![CDATA[Reply to Problem with fft example in Pd tutorial on Tue, 23 Jul 2024 00:07:17 GMT]]>@jamcultur I bet the examples are out-of-date, e.g. ch 1.2 of that tutorial says "This tutorial assumes Pd-extended version 0.39 or higher." That was a little while ago!

I was able to fix things by opening up the properties of the magnitude table, changing the size to 32 (which makes more sense than the given value of 100 if it's a real FFT in a default 64 sample block), and saving the patch again. Looking at the before and after using a text editor and you can see that the array declarations are somewhat different.

]]>http://forum.pdpatchrepo.info/topic/14805/problem-with-fft-example-in-pd-tutorial/2http://forum.pdpatchrepo.info/topic/14805/problem-with-fft-example-in-pd-tutorial/2Tue, 23 Jul 2024 00:07:17 GMT<![CDATA[Reply to Problem with fft example in Pd tutorial on Tue, 23 Jul 2024 14:41:12 GMT]]>@jameslo Thanks! That works better.

]]>http://forum.pdpatchrepo.info/topic/14805/problem-with-fft-example-in-pd-tutorial/3http://forum.pdpatchrepo.info/topic/14805/problem-with-fft-example-in-pd-tutorial/3Tue, 23 Jul 2024 14:41:12 GMT