This rack fx takes incoming audio and splits it into 3 streams based upon user defined frequencies (low/mid/high). The 3 streams are then run through fx layers (add your own fx) and then mixed together.
The low and high streams are created via low/high pass brickwall filters. The middle stream is created by adding the phase inverted low/high streams to the full incoming audio (e.g. noise cancelling).
Inspired by a 3 band fx AUv3 I missed greatly working inside Drambo.