User guide

Notes on IR Processing Topology
Three topologies for convolution are provided for each of the IR1 and IR2 containers:
1. Parallel Stereo: The left input channel is convolved with the left impulse response file
channel and the right input channel is convolved with the right impulse response file
channel. This is the typical configuration for stereo convolution reverbs when used with
stereo impulse responses, although when input audio is panned left or right, using ‘Mono to
Stereo’ may provide more intuitive results.
2. True Stereo: The left input channel is convolved with the left and right impulse response file
channels from IR1-A and the right input channel is convolved with the left and right impulse
response file channel from IR1-B. The two output convolutions’ respective left and right
components are then summed into a single stereo output. This configuration is necessary to
take full advantage of true stereo impulse responses. True stereo impulse responses are
required to be provided as two separate stereo files and loaded into IR1-A and IR1-B (or IR2-
A and IR2-B). This configuration is typically found in high-end algorithmic reverbs.
3. Mono to Stereo: The left and right input channels are mixed to mono and then
independently convolved with the left and right impulse response file channels. When using
a single stereo impulse response file, this is useful when input audio is panned hard left or
right; this configuration is often encountered in low/medium-end stereo algorithmic
reverbs.