As someone who has been using behringer X/m32 products for nearly 2 decades now (hard to believe it's been that long!) and as someone who's done a lot of high and low end live audio work this is pretty cool. You don't often see mfgrs being so open about transport protocols or the specs are locked behind expensive paywalls and hardware to mess with them isn't remotely affordable.

I am curious how the pictured A2B board interfaces with the X/M32 board. If that's an AES50 implementation then maybe there's the possibility someone could roll up an AES50 router. That could be cool.

Card-carrying AES member here.

The X32 module interface is actually fairly simple: it's more or less just four 8-channel I2S TDM streams going in either direction. Easy peasy to interface with, nothing as complicated as AES50 involved.

AES50 itself is actually a standard; you can buy a copy of it for $50. It's basically just "Ethernet with fixed addresses and a custom frame format across two of the wire pairs, a super fast (64x the sample rate, with a -12.5% followed by a +12.5% duty cycle pulse every 2048 samples) clock signal across the other two". I've been meaning to whip up some boards that speak AES50 one of these days, just for fun.

A router would be totally possible, with of course the caveat that AES50 itself is point-to-point so you'd need some sort of out-of-band mechanism to tell the router where to send all the incoming audio streams it's receiving.

Lack of open standards also had a very negative effect on prices. A&H stageboxes are super expensive compared to others, but if you run Allen console then there is no alternative. Other than Dante I guess, but that is also expensive.