I agree that an AVB option card would be a valuable asset for the SQ series.
AVB seems to be progressing as an industry standard and finding wider adoption in the pro audio realm. The new Milan protocol may accelerate that progress. If an affordable option card for the SQ could be produced, I would certainly be very interested.
Using my SQ-6 (v1.2.2), I have completed several multitrack (24+ channels) remote recording sessions using the USB-B streaming option to Pro Tools, and fortunately have an older MacBook Pro with USB 2.0 ports that generally work well. The USB cable connection seems to be critical, and I have had several brief but nervous moments when the clocking from the SQ was lost or intermittent, but those problems were resolved by reseating the USB plug in my computer.
That being said, the advantages of AVB, particularly for the current versions of Pro Tools running on current computers and operating systems, might be a more robust and forward compatible solution for multitrack recording, and would avoid some of the USB issues that have been reported.
