How to install fftw3.dll

    Aug 30 2010 | 8:12 am
    I am using the analyzer~ external, and when making a windows version of my patch it requires fftw3.dll. How do I install this? It does not seem to work by putting the file in the external or patch folder...
    Do I really need to install a C-compiler ++ to install this thing?

    • Aug 30 2010 | 9:08 am
      Have you tried putting the dll in your windows/system32/ folder?
    • Aug 31 2010 | 11:03 pm
      Ah.. it should pe put in the Max/MSP folder... windows/system32/ did not do anything...
    • Apr 22 2011 | 6:16 am
      Hi, this issue may be more related to fftw than Max, but I'm hoping it's relevant: I downloaded the precompiled fftw 3.2.2 dlls from but I can't find anywhere to download a file called fftw3.dll exactly. I've got libfftw3-3.dll and a couple other dll's, and I placed those in my 'Max 5.0' and 'Max 5.0support' directories. When I make an analyzer~, though, I'm still getting errors saying fftw3.dll is not found, so I think the other dlls must not be sufficient. Any ideas? Thanks!
    • May 04 2011 | 8:36 am
      I downloaded older version fftw 3.01, it works
    • Mar 04 2013 | 9:24 pm
      I am having a similar problem. I have a Pitch~ external object but it won't work because the fftw3.dll is in the wrong place.
      Any suggestions?
    • Dec 27 2013 | 1:30 pm
      this solved the problem for me:
      found on google, extracted fftw3.dll in the Max folder.
    • Jan 09 2014 | 8:16 pm
      Hi all - did this work for people working on Windows 7 / 64 bit? (sorry if these are dumb questions... i'm normally an OSX user)
      I've not been able to get Paul's external dll bundle to work with either with Max 5 or Max 6 on Windows 7 64 bit ;)
      Any ideas?
    • Mar 14 2014 | 3:43 am
      I got a different external to work by putting this file
      in my Max folder (win 7 64-bit). That, and the actual external file went in .../Cycling '74/msp-externals (being that is was an MSP object).
    • Mar 14 2014 | 5:04 pm
      good timing for this thread. was trying to get Shifter~ working yesterday in Max 6. I installed the fftw3.dll from Tristan Jehan's website and installed it in my main Cycling '74 folder and it would work in Max 5 but not Max 6.
      just tried TO_THE_SUN's .dll and all is working well now in Max 6. yay!
    • Aug 06 2016 | 9:55 pm
      Hi: For W7 64 bit copy in sysWOW64 the fftw3.dll file. Regards.
    • Aug 06 2016 | 9:56 pm
      Paste in sysWOW64 for w7 64 bits . Regards