This release allows Convolver to run on all x86 cpus (not just Pentium 4).
Convolver is a (free) real time DSP audio plug-in for Windows Media Player.
The install package also contains two DirectX/DirectShow filter versions ConvolverWrapper or the equivalent ConvolverFilter for Adobe Audition and real time applications such as Zoom Player Pro, TheaterTek 2.2, J.River Media Center (when used with the DirectX host plug-in), or Console.
Convolver will take a set of impulse response (FIR filter) files and convolve them with sound paths mixed from the input channels, mixing the results into a set of specified output channels.Applications
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 should also be able to 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.
- Performance is excellent, possibly the best available under Windows, and subject continual improvement. A stereo 65536-tap filter, the largest that makes sense when applied to a 44.1kHz source, executes at 40 times real time, representing a 3% cpu hit, on a 3.4GHz Pentium 4.
- Arbitrary-length convolutions for unusual applications (1 million tap limit imposed only as a sanity check)
- Multi-channel input and output, PCM and IEEE Float
- Mixing and scaling of both input and output channels
- Wide range of filter file formats accepted (Microsoft WAV, SGI/Apple AIFF/AIFC, Sun AU/Snd, Raw (headerless 32-bit IEEE float), Paris Audio File (PAF)
Commodore IFF/SVX, Sphere/NIST WAV, IRCAM SF, Creative VOC, SoundForge W64, GNU Octave MAT4/5, Portable Voice Format, Fasttracker 2 XI, HMM Tool Kit HTK)
- Sample encodings supported include unsigned and signed 8, 16, 24 and 32 bit PCM, IEEE 32 and 64 floating point, U-LAW, A-LAW, IMA ADPCM, MS ADPCM, GSM 6.10, G721/723 ADPCM, 12/16/24 bit DWVWk, OK Dialogic ADPCM, and 8/16 DPCM.
Windows Media Player plug-in and DirectShow filter interfaces
Several filters can be loaded at once. The first to match the playback format (channels, sample rate) is automatically selected.
- Convolver runs on Windows XP/2000 with DirectX9. (It may also 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.
- ConvolverFilter and ConvolverWrapper DirectShow filters need a DX host (eg, Adobe Audition).
- From version 2.19, Convolver runs on all x86 cpus. Earlier versions needed a Pentium 4 class cpu.