On 05/05/2011 10:32 AM, Thorsten Mühlfelder wrote: > Hi, > > I'm using a high quality USB audio device (Burr-Brown Japan PCM2702) with my > Dockstar. I've configured mpd to use the hardware interface without dmix > because dmix seems to be broken on the ARM platform. > > But there is one problem left: sometimes clicks and pops can be heard. They > appear randomly up to 2 times a minute. My impression is that hard disk data > transfer causes them, because using "hdparm -t" makes the situation worse. On > the Dockstar all USB devices are connected via hub to the same USB > controller: > # lsusb > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB > Bus 001 Device 003: ID 0bc2:2120 Seagate RSS LLC > Bus 001 Device 005: ID 08bb:2702 Texas Instruments Japan Speakers > > Is it possible to give the USB audio data transfers a higher priority? >
Hi, You might try 'chrt', but you need to find the process(es) ID(s) responsible for all the audio stuff. Eventually, check here: http://subversion.ffado.org/wiki/IrqPriorities but it's rather about real-time Linux. -- Pozdrawiam, Best regards, Andrzej Telszewski _______________________________________________ ARMedslack mailing list ARMedslack@lists.armedslack.org http://lists.armedslack.org/mailman/listinfo/armedslack