Allocate poly signals in order of activity (based on gates), to the lowest available poly voice number. The Top-Down Poly Voice Allocator serves a very specific purpose, so either it solves a problem you've run into or perhaps, you might realize the ability to do something interesting when you try it out.

As you play polyphonic notes, they are normally assigned to random poly voice numbers. Where the poly connection wires are essentially bundles of 16 wires, each voice number can be thought of as an individual wire. The random distribution is usually a nice way to prevent overlapping notes.

But, if you use MPE or devices like the Poly Collector/Distributor, then you might actually be interested in giving each of the poly voices their own individualized sound, and you might also want to have some control over which of the individualized sounds are invoked, and when. Since the Top-Down Poly Voice Allocator puts notes into the lowest available voice number, you can gain that level of control.

Just connect a poly gate signal (that's how it determines which voices are active) and any other signal, such as pitch cv. The two will be sorted together. Use multiple units for more signal sorting. Make use of the individualized mono jacks as a breakout for the poly connections (there's a switch to set whether they output the sorted gate signals or the sorted cv signals), and you're well on your way to creating separate signal paths for each voice.

If, on the other hand, you want to sort based on notes, take a look at the Note Diverter