bluebell wrote:As I posted in another thread:
I bought an Ultralite AVB and was disappointed when I had the "traveling channels"-issue.
I tested the latest firmware versions from http://motu.com/techsupport/technotes/f ... changelog/ and found out that 1.3.2+520 is the latest version that provides error-free operation.
I bought it, too, and there was even a firmware later than the latest official version v1.3.5+626 installed. I had the same traveling channels problem: When starting playback, it worked for a few seconds on one stereo pair, then disappeared slowly with lots of noise, and I could see in the web interface that it moved to higher channels. Then after some minutes it was again on the first 2 channels. Installing version 1.3.2+520 fixed this.
But now I have a problem that I can't play with 192 kHz. For example I start Audacity and play a file with 192 kHz (with ALSA), and project rate set as well to 192 kHz. But in the display of the Motu I see only "48k". Changing the samplerate in general works, because I can set it to 44.1 kHz and then the display shows "44k".
Looks like Motus is "famous" for bad USB implementations. For example another device had problems with MIDI, because the Motu USB implementation was not implemented according to the USB specification:
https://lore.kernel.org/lkml/Pine.LNX.4 ... wland.org/
Might work in Windows and Mac by chance, but maybe will stop working with the next OS update, all bets are off if it is not implemented right. Might be very good audio quality, but I'm thinking about returning it if USB doesn't work stable.
If I can't get it to work, does anyone know another audio interface with DC coupled outputs and 192 kHz samplerate which works in Linux?