User guide

2.5. SplitMod Tab (Early/Late Split Pitch Modulation)
Many high-end reverb processors modulate their early and late reflections to provide a dynamic and
rich sound. Since modulation of individual reflections within a pre-existing impulse response cannot
be achieved, a simulation of the net effect of this is provided as a pitch modulator that can be
applied to the early and late components of the IR independently. This can provide some of the
characteristic thickening and modulation desired in high-end reverb processors.
Two SplitMod modules are provided and are arranged as follows:
• IR1: Connected to the outputs of IR1 (before the mix of IR1-A and IR1-B, if applicable).
• IR2: Connected to the outputs of IR2 (before the mix of IR2-A and IR2-B, if applicable).
When using the pitch modulators the CPU load is higher as independent convolutions are running in
parallel as well as up to 4 modulators per IR. The IR is split into two convolvers depending on the
'split at' control, and then a separate pitch modulator is run on each depending on the rate and
depth selected.
Higher values of rate and depth cause a spin effect, and lower values more of a wandering effect (for
a natural sound lower rate values are recommended somewhere between 0.2 to 1 Hz with a
moderate delay depth somewhere between 1 to 2 ms). The rates and depths are slightly altered for
each stereo or true stereo channel to increase the perceived modulation.