I've been (over)thinking how I'd hook this up. Most devices that have an eArc input only have one HDMI output, and I need to send a signal to two monitors. I also don't love using a small dongle as an HDMI switch as I'd prefer something more stable and preferably rack-mountable to hook my inputs and monitors to.
My thought is I could use a matrix splitter like
https://www.amazon.com/MT-VIKI-Matr...lpcontext&ref_=fplfs&smid=A3R2WRS5QNVSPP&th=1 as well as an eArc extractor like
https://www.orei.com/products/4k-hdmi-audio-extractor-switch-with-earc-and-edid-management-hda-934. Inputs 1-3 on the matrix splitter would be for blu-ray players, game consoles, etc. Output 1 on the matrix splitter would go to the input on the eArc extractor. eArc input would go to the Minidsp HDMI. Output on the eArc extractor would go to input 4 on the matrix splitter. Output 2 and 3 on the matrix splitter would go to my monitors.
I think this would work. The matrix splitter never needs to pass eArc. My biggest concern would be around EDID management; I'm not sure how mixing two splitters would interact on the EDID front.