Hello.
According to the manual :
https://s3.amazonaws.com/motu-www-data/manuals/avb/624_User_Guide.pdf
Page 45.
Do you run any optical device ? Or a outside clock device to sync with ?
The only «problems» i have with the MOTU 624 AVB with Gnu/Linux (Debian
8.7 and 9) are :
Got 1 Xrun per Hour, not matter what i do, even if i do nothing with the
computer.
If i change the Buffer size, sometimes called frames/period, the lower i
set it the more i get Xrun without doing nothing with the computer.
I guess it's a USB3 (never tested USB2) problem with either my
motherboard - not a new one - or Alsa....
Latency is not a problem for what i'm doing, as i also have with the
MOTU 624 AVB the routing grid that allow to have direct monitoring.
Other thing :
If i set the Sampling Rate in the MOTU 624 AVB's web interface, to
192000, all the «From Computer» (1 2 3 ...) disappear, thus no sound
from anything played from computer.
Never investigate further this point as i do not know why i would use
192000 sampling rate...
Cheers !
On 2017-12-21 05:01, georgnk wrote:
> Hi guys, I think I found the cause of these tiny clicks.
> Messing around with clock mode I discovered that changing the clock
> mode
> affects the rate of these clicks. Choosing ltc or optical mode then
> back to
> internal..They stop for a while and then start again.
> If you have any ideas I 'd appreciate a lot.
> Cheers
>
>
> georgnk wrote
>> Hi.
>> Yes the firmware is v1.3.2+102 (520 is for the avb)
>> I don't know either what the bios menu is doing. I can only find bios
>> if I
>> press the select button from my interface and shows some info,nothing
>> more.
>>
>> If you test it one day please let me know if you also have this
>> (minor)
>> issue.
>>
>> Have nice holidays. Cheers!
>>
>>
>>
>>
>> list-2 wrote
>>> Hello.
>>>
>>> I am away from my computer with the MOTU 624 AVB for the holidays.
>>> I'll
>>> make a try when i'll be back.
>>>
>>> But i've just checked the firmware pages of MOTU's web site and :
>>>
>>> v1.3.2+520 (Release Date 2017-12-13)
>>>
>>> A new one as been added few days ago. I've never tried this one.
>>> Is the the firmware you running your card with ?
>>>
>>> The change log says :
>>>
>>> Added Bios menu
>>>
>>> Hmm i'm really wonder what it does, and if it break anything with
>>> Gnu/Linux Os.
>>>
>>> Cheers !
>>>
>>>
>>>
>>> On 2017-12-20 02:41, georgnk wrote:
>>>> Hello thank you for the reply.
>>>> The clicks are periodic.well,not strictly periodic but almost every
>>>> two
>>>> seconds. I have tried your suggestions but didn't change something.
>>>>
>>>> What I have also discovered is that the clicks are not passing
>>>> through
>>>> my
>>>> software. Testing a sine wave and using a spectrum analysis in real
>>>> time,
>>>> sndpeek, clicks don't show up there. It seems they are coming
>>>> directly
>>>> to my
>>>> monitors (headphones)
>>>>
>>>> Thanks a lot
>>>>
>>>>
>>>> Len Ovens wrote
>>>>> On Mon, 18 Dec 2017, georgnk wrote:
>>>>>
>>>>>> I can also select my sound card without qjackctl and Jackd.
>>>>>> Pure data can see my input s and outputs directly. Then I go audio
>>>>>> test
>>>>>> play
>>>>>> the sine wave , wait a while, I move frequency up and down,clicks
>>>>>> start
>>>>>> and
>>>>>> never stop.
>>>>>
>>>>> If these are random clicks, that sounds like sync issues. Some
>>>>> things
>>>>> to
>>>>> try:
>>>>> - set pulse default and alternate sample rate to 48000
>>>>> - turn off HDA audio either in bios or in pulse:
>>>>> pactl unload-module module-udev-detect
>>>>> pactl unload-module module-alsa-card
>>>>> (note that if pulse can see any audio card directly,
>>>>> it may choose to sync from that one even if you are
>>>>> not using it)
>>>>> - try different sample rates, in particular both 44100 and
>>>>> 48000. It may be that alsa is under the impression
>>>>> it can set sample rate when that is not the case.
>>>>>
>>>>> I have not seen in this thread any meantion of the web interface
>>>>> that
>>>>> the
>>>>> motu AVB series interfaces normally have, so I am guessing this is
>>>>> not
>>>>> one
>>>>> of these boxes. Motu's support in the past with Linux has be
>>>>> notoriously
>>>>> bad until the AVB series, so you may have something that will not
>>>>> work
>>>>> with Linux properly... as in, it is USB2.0 compliant so far as
>>>>> sound
>>>>> transfer is concerned, but expects a provided blob to do device
>>>>> setup.
>>>>> The
>>>>> AVB series uses a web based setup tool that is OS agnostic.
>>>>>
>>>>> --
>>>>> Len Ovens
>>>>> www.ovenwerks.net
>>>>>
>>>>> _______________________________________________
>>>>> Linux-audio-user mailing list
>>>>
>>>>> Linux-audio-user@.linuxaudio
>>>>
>>>>> https://lists.linuxaudio.org/listinfo/linux-audio-user
>>>>
>>>>
>>>>
>>>>
>>>>
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