Ultralite AVB

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Re: Ultralite AVB

Postby Musinux » Tue Apr 10, 2018 4:27 pm

alcomatt wrote:
. I am quite busy right now so it might take me a while.

I came across that patch as well.

Since I'm too lazy to build a patched module, I tried adding

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options snd_usb_audio index=3 quirk_alias=07fd0005:168600dd


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options snd_usb_audio index=3 quirk_alias=07fd0005:154e1003

to /etc/modprobe.d/sound.conf (not both at the same time of course),
which should work the same way as loading the patched module would.

The first one works just like unquirked.
With the second, it was nearly impossible to switch samplerates in jack and,
after playing around with it too much, the Ultralite locked up (in a crazy new way).

If I'd build a patched module, I'd play around with the delay amount (as suggested in your URL as well).

Edit: In the case somebody wants to try other usb ids with the modprobe method, you might have to remove or edit the "index=3" part.
grep https://github.com/torvalds/linux/blob/06dd3dfeea60e2a6457a6aedf97afc8e6d2ba497/sound/usb/quirks.c for USB_ID.

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Re: Ultralite AVB

Postby Be. » Sat Apr 14, 2018 12:15 pm

alcomatt wrote:Has any of you manged to get a decent performance with jack2? I keep on having xruns all over the place, regardless what I do. With Jack1 however, the performance is solid and I can 0 xruns with buffer sizes down to 64. I would have moved back to jack1 but sadly Bitwig only supports jack2 and now I am in a right kerfuffle... this catch-22 situation drives me mad

Interesting. I have not tried Jack1.

alcomatt wrote:I may have a solution to this but not 100% sure yet. I have been checking my kernel logs and I kept on seeing the below error reported from the device:

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usb 3-4: clock source 1 is not valid, cannot use

This lead me to http://guillaumeplayground.net/teac-ud- ... mment-8186 and it looks like it is worth a shot. I will try writing a quirks options for MOTU hardware IDs and see if it makes a difference. I am quite busy right now so it might take me a while. If any of you are experienced in C then you're more than welcome to try

Cool, I would be happy to test patches. Maybe if we're lucky that will magically fix the crackling too?

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Re: Ultralite AVB

Postby Ulrich » Wed Apr 25, 2018 11:45 am

Anyone tried the patch ? Does it fix the issue when plugging the card ?

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