On the Boris FX What's new in Boris RED 5 page the following indicates the presence of Beat Reactor:
BCC Particle Array 3D is an OpenGL-accelerated particle-based 3D generator. It generates a 3D array of particles and offers several interesting ways of manipulating the array based on graph controls, alternate AE layers, fractal noise patterns, random dispersion, and more. The filter includes an integrated Beat Reactor group for creating dynamic animations directly influenced by audio layers.
BCC Pin Art 3D is an OpenGL-accelerated particle-based 3D generator. Like a 3D-capable LED or halftone type of effect, it can be used to achieve a wide range of both 2D and 3D-looking surfaces.Features such as sophisticated built-in wipes and an integrated Beat Reactor group allow for creating dynamic animations within the filter, including animations directly influenced by audio layers.
There no integrated Beat Reactor group in these filters in M100 Suite, right? Maybe in the 64 bit, non-M100 version? The Particle Array description makes mention of AE layers and we know that is not in M100. Oh well...