Maxwell at Meatscience writes in to announce the debut of the Meatscience Convolution Reverb plug-in and the Open Impulse Response Library, a free IR repository for users to submit their impulse responses and download impulses from a well-organized, expansive library with server-side convolution allowing instant online preview with a variety of audio signals.

Meatscience Convolution Reverb matches or exceeds Altiverb 6 and IR-1 on accuracy and low-latency while offering similar performance on Intel Macs. This means professional fidelity, an open IR library, and high track counts at a far lower price. Apply impulse responses to recreate the unique characteristics of real spaces, speaker cabs, classic amplifiers, stompboxes, or experimental audio effects.


  • Zero-latency
  • Fast (SSE Optimized for Intel Macs)
  • Live switching between IRs
  • Mono, Stereo, and True Stereo (4-channel) IRs supported
  • Supports WAV, AIFF, and SDIR IRs
  • Works with the Open IR Library
  • OS 10.5+ Only
  • Automatic Gain
  • Cocoa Native UI, Clean and Fast
  • Free Upgrades – V1.2 coming soon
  • No Dongle/iLok/DRM

Just as interesting is the promise of an open repository for impulse responses, which are used by many modern plug-ins including Meatscience’s. An impulse response is an audio recording used to recreate the acoustic characteristics of a specific environment or filter.


Convolution is the process of applying the audio characteristics of an impulse response to another audio signal. The impulse response is ‘convolved’ with an incoming signal, say a vocal or guitar track, creating the effect of playing the unprocessed audio in the same environment in which the impulse response was recorded.

Meatscience Convolution Reverb is available now, for $50 direct from Meatscience. It is an AU plug-in for Intel Macs, requiring OS X 10.5 or later. They are working on updates for OS X 10.4 and PowerPC Macs.

Discuss Meatscience Convolution Reverb and the Open IR Library in our Effects forum.