I’ve been using a Vermona “Action Filter” lately (an analogue, stereo HP and LP filter box). I believe it was originally Designed for DJ-use, but it works surprisingly well as a mixing tool. I’ve been using it with Ableton as an external audio effect (in an external loop with a small mixer and other HW effects), bouncing stereo tracks through it and back into Ableton.
Working like that gradually made me realize, that it would be awesome to have several similar filterboxes for mixing individual stereo tracks together “outside the box”, - like for doing mash-ups, for example. But the hardware logistics of using multiple “Action Filters” in connection with an outboard mixer is hard to make work.
Having several identical filters (in a small rack), each connected to a stereo bus on a hardware mixer, is visually confusing (and takes a lot of cables as well).
So, I’ve been searching for small hardware mixers, with built in, similar type, analogue HP and LP filter (24dB pr. octave, resonant) on each channel. But so far without much luck.
Am I overlooking something obvious?