I'm considering upgrading my digital source from a rather obsolete board that doesn't work with Raspberry Pi 4s to a setup based on Ian Canada's boards. Currently I use a single stereo DAC feeding a board that splits the signal into 2.1 in hardware, with a fixed crossover frequency. This isn't very flexible and as the latest version of moodeaudio integrates DSP software that should be able to do the splitting in software I'd like to know if it's possible to use 2 of Ian's DAC boards to obtain up to 4 audio channels output (I only really need 3 but the boards are stereo so...) That way I could get rid of the hardware 2.1 board. Has anyone done anything like this?