Hello.
MOTU has release a new firmware for some AVB cards.
https://motu.com/proaudio/index.html#avb-download-additional-resources
Tested on a 624 AVB with a Gnu/Linux Debian 9.4
Install with no trouble - how great is this embedded interface, so easy
to control the card and updates with Gnu/Linux.
Previous firware on the card was the v1.3.1+81 (Release Date
2017-06-21) i've never installed the v1.3.2+102 (Release Date
2017-12-13)
Some changes in the interface - Touch control menu added, i do not use
it.
So far 0 sound/linux troubles here. Tested playback/recording from
analog or guitar input and mic input.
Changelog.
v1.3.4+202 (Release Date 2018-06-20)
Introduces new Touch Console™
Fixes an intermittent issue that could cause audio glitch on USB input
Improves audio startup timing
-
All the best.