On Sun, 14 Feb 2016 18:19:49 +0100 Ralf Mardorf <ralf.mardorf@xxxxxxxxxxxxx> wrote: > Then follow Len's advices: > On Sat, 13 Feb 2016 17:04:45 -0800 (PST), Len Ovens wrote: > >mv /etc/security/limits.d/audio.conf.disabled /etc/security/limits.d/audio.conf > The defaults of Ubuntu might differ to the settings recommended here: > "@realtime - rtprio 99 > @realtime - memlock unlimited" - > http://www.jackaudio.org/faq/linux_rt_config.html > Consider to edit the values to the above defaults, resp. to > @audio - rtprio 99 > @audio - memlock unlimited This is fine since it is set at 95. memlock is also unlimited. > id > if there's no group (audio) shown, you need to add the user to this > group. This is also OK. > >install rtirq. > > > >As you are running a delta1010 (I think), sudo > >edit /etc/default/rtirq... the line that says: > >RTIRQ_NAME_LIST="something something" > >to: > >RTIRQ_NAME_LIST="snd_ice1712" > > Reboot and after rebooting run Now this might be the crucial point. rtirq is installed and the rtirq was modified to exclude anything but the sound card RTIRQ_NAME_LIST="snd_ice1712" And then ./rtirq start was executed, as indicated in an advice here and/or web page (sorry too many info at one time - can't complain though ! :) and that is the important point. By running 'rtirq start' the impression was given that there's no need to reboot. Which gave: % ./rtirq status PID CLS RTPRIO NI PRI %CPU STAT COMMAND 87 FF 90 - 130 0.0 S irq/8-rtc0 547 FF 90 - 130 1.2 S irq/18-snd_ice1 After a reboot it is: ./rtirq status PID CLS RTPRIO NI PRI %CPU STAT COMMAND 449 FF 90 - 130 0.7 S irq/18-snd_ice1 47 FF 50 - 90 0.0 S irq/9-acpi The other thing that was done is to set all scaling_governors to 'performance'. Not so sure if this changed anything and I haven't tested it yet. I have asked before about the scaling_governor since it is always mentioned during an Ardour install and I was left under the impression that I should not care about this. So. After a reboot, the ardour session plays OK. There can be a faint, very sparse crackling noise although no 'JackAudioDriver::ProcessGraphAsyncMaster: Process error' reported by jackd in the console jackd was launched, with both the '-p 128 and --sync' options. It is now quite good. I tried the setup with a few acoustic guitar lines and it is no longer a fight to record something ! As is, it si impressive. There may very well be some fine tunings to do. I would also like to clean up the notes I have taken and post a summary of the steps and a big thank you to everyone who helped ! Cheers. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
