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 -- Sent from: http://linux-audio.4202.n7.nabble.com/linux-audio-user-f5.html _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user