[LAU] Hardware Soundcard - MOTU 624 AVB Working with Gnu/Linux - Debian 8.7

[georgnk]

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
> 
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