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Convolver a convolution plug-in

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Convolver is an open source, high performance Windows application for applying finite impulse response (FIR) filters to multi-channel digital audio in the form of

Convolver will take a set of FIR filter files (sound files) and convolve them with sound paths mixed from the input channels, mixing the results into a set of specified output channels.


Why would you want to do this?  There are several main applications:

  • With a suitable impulse response generated by a tool such as DRC you will be able to play sound corrected for your room response.  For more details, see Ed Wildgoose's Duff Room Correction site. 
  • You can also use Convolver for bass management, cross-overs, cross-talk cancellation, equalization and other purposes that require the source signal to be filtered and redirected to different output channels.
  • You can also use Convolver as an effects filter (reverb) in Adobe Audition, or other sound or music application that accepts DX filters.



Convolver runs on Windows XP/2000 with DirectX 9.  (It probably won't run on earlier versions of Windows.)

  • The Windows Media Player plug-in needs WMP10 or WMP9. Otherwise you will get a convolverWMP.dll failed to register message upon installation. If you continue installation in such circumstance, you may, nevertheless, get access to ConvolverFilter / ConvolverWrapper.
  • I have not found a way of running it with the Windows Media Center Edition (MCE) interface.  (It will of course run with WMP under Windows MCE 2005.)  One way of handling this may be to use the VST version with an Audiotrak Prodigy 7.1 sound card or, on a Sony Vaio, SonicStage Mastering Studio Audio Filter.
  • ConvolverFilter and ConvolverWrapper DirectShow filters need a DX host (eg, Adobe Audition).
  • It may be possible to get ConvolverFilter or ConvolverWrapper to work with WinAmp using the Chronotron's Adapt-X plug-in, but I have not tried it.

From version 2.19, Convolver runs on all x86 cpus.  Earlier versions needed a Pentium 4 class cpu.


Convolver is licenced under the GPL.


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Last modified: 16-Jan-2008 20:24 -0000 Logo