First, a quick link:https://www.sweetwater.com/store/search.php?s=motu+avb&Go=Search
There are three new AVB interfaces there that are not even announced on MOTU's web site.
All are $595, all are AVB compatible, and have digital input and output only. All have USB2
connection for direct connection to a host computer. If you are only using one computer,
you can connect directly to the computer via ethernet (AVB). But if you want to use two
computers and two AVB interfaces, you must use the ethernet ports on both interfaces to
carry the audio via a crossover CAT 5E or CAT 6 cable. So the interfaces must connect to
the computer via either USB2 or Thunderbolt.
The LP32 comes with 4 banks of ADAT in / out (1 x speed = 32 channels, 2 x = 16 channels).
The 8D provies 4 channels each of coaxial S/PDIF and AES / EBU (on XLR).
The M64 provides MADI connections for 128 in / out.