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 fa FractionalDelay by forward audio is a Virtual Effect Audio Plugin for Windows. It functions as a VST Plugin.
fa FractionalDelay
Product fa FractionalDelay
Developer forward audio
Price (MSRP) Free
Type / Tags
Plug-in, App & Soundware Format(s)
Operating System Availability
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 0.92  Downloads Released
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fa FractionalDelay is a completely free phase alignment and time manipulation effect plugin. It uses an oversampling and interpolation algorithm to apply signal delays with a precision of 0.000001 Samples. With this possibility it does phase alignments between microphone signals even with varying microphone or sound source distances during the recording. It gives you the ability to improve your post-production of live/studio recordings when moving musicians or microphones can complicate phase relations. In that case, use your DAW automation to smoothly fade between single delay amounts.

Nevertheless, with a correct DAW routing and multiple instances of fa FractionalDelay, you can also apply stereo effects like moving haas delays, create colorful filter textures like a moving comb filter (similar to a really slow phaser effect) or do manual artificial double tracking with varying delays.

The plugin user interface is specially designed to quickly find and compare the right delay value. Therefore, you're able to determine the applied delay in samples, milliseconds, meter and foot. For quick setting comparisons use the A/B Switch and if you want to have fine adjustments the Min-Max-Editfields let you change the control range of the delay knob.

Remember: This is NOT a regular delay effect with several duplicates of an original signal. It's a phase alignment tool which also needs to be applied on different tracks with an existing phase relation. If you apply it to a mixdown or on tracks without phase relation you will hear NO AUDIBLE DIFFERENCE. A tutorial video on using fa FractionalDelay will be published in mid-August to show the right usage of this plugin:

  • Signal delaying with a precision of 0.000001 Samples (Maximum of 100,000 Samples).
  • Phase alignment of varying microphone distances via DAW automation.
  • Oversampling with 2x-8x.
  • A/B comparisons.
  • Enter delay values in samples, ms, meter & foot.
  • Editable Min-Max-Values of the Delayknob.
  • Unique flexible user interface.
  • Available as VST 2 for Windows (VST/AU for Mac currently in development).


Discussion: Active


3 August 2014 at 1:27amEanna

Very promising entry in DC14, I'm not aware of other free tools similar to this... However, I appear to have difficulty getting Ableton current (9.1.3) on Windows 7 32-bit to load the plugin.. I've installed the 32-bit, then the 32- and 64-bit plugins just in case, I see the "fa FractionalDelay_x86.dll" in my VST dir, but it's not listed in Ableton... I've tried renaming it (removing the initial "fa " so it doesn't have spaces), but that didn't appear to make a difference. Ableton is a pretty decent VST host, so I wonder what VST headers might be missing in your build?

Anyone else have similar issues? I'll be happy if this is a User Error thing...

Thanks Forward Audio, and good luck in the competition.

7 August 2014 at 4:51pmvitalker

I have downloaded two files: the first file needed one library, the second file couldn't downloaded fully.

5 September 2014 at 10:16pmBoone777

Tried it once everythin was fine. Could'nt open my project the next time.Add to delete from my plugin folder to reopen song. Reaper 64 win 7.

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