I got MOTU UltraLite AVB a few weeks ago and went through some very frustrating experiences; I'm planning to return the unit
. Hopefully this information will help somebody else make their decision.
Right out of the box, my unit has the channel hopping problem (therefore LTC doesn't work for this reason).
Following this thread, I thought I could just revert my firmware to 1.3.2+520, or request for 1.3.4+558 and flash it, and have a smooth USB experience. However, I got this error message when I tried to flash 1.3.2+520.
Error message received from server: This update applies to ULTRALITE AVB and STAGE-B16. Please select an update that applies to your ULTRALITE AVB ES. (Code 403)
MOTU support informed me this:
Motu has recently updated the hardware (and DAC convertors) of the UltraLite AVB. Unfortunately, this means that older firmware versions cannot be installed on newer models.
and offered the older model for exchange. I asked whether the older model will keep getting new firmware support, and whether the new model's sound quality is better or the same, and they stopped responding. (It's not even Linux questions!)
I've been a long time MOTU fan (on Windows and Mac) since the late 90s. I even had a very good Linux experience with MOTU 8M (old firmware) (integrated into a streaming service); that's why I bought UltraLite AVB. However, it looks like the honeymoon period of MOTU+Linux has passed.
I understand I can go with drumfix's network AVB route (and settle on 8 channels instead of 24) -- btw great job -- but this makes the setup not very portable for me (compared to a pure USB solution).
Anyway, if you are on the fence about buying MOTU UltraLite AVB for linux, know that the unit you will be getting is actually UltraLite AVB ES, which will not work for Linux.