On Aug 17, 2017 12:08, Jaromír Mikeš <mira.mikes@xxxxxxxxx> wrote: > > > > 2017-08-17 22:10 GMT+02:00 Ralf Mardorf <ralf.mardorf@xxxxxxxxxxxxx>: >> >> On Thu, 17 Aug 2017 15:48:18 -0400, Paul Davis wrote: >> >On Thu, Aug 17, 2017 at 3:21 PM, Fons Adriaensen wrote: >> >> On Thu, Aug 17, 2017 at 01:59:29PM -0400, Paul Davis wrote: >> >> >> >> > parameters which were never really meant to be exposed to users >> >> >> >> then the at least the defaults should be OK. They usually are not. >> >> >> >I've never adjusted any of the parameters that are now on that tab in >> >more than a decade. >> > >> >There has never been a pull request or a bug report suggesting new >> >defaults. >> >> Why should somebody suggest new defaults? The values could be >> adjusted, if required and QjackCtl provided most jack parameters, if not >> all in a single tab, before it was split into two tabs. Much >> likely LTS release distros still provide the old version of QjackCtl, >> let alone that jack's defaults provided by package maintainers could >> vary, I've seen configurations with --clients=foo >> --ports-per-application=bar. > > > The reason I started this topic is that I bought new USB sound card Focusrite 2i2. > But I am not happy with latency 15-20ms is not fine for simple task I am using it. > Just running japa to check RTA. > Periods/Buffer 3, deadline scheduler, scaling_governor performance > > Just trying figure out if I can make somewhat better. > > mira And to think all I did to get my cheap USB sound card to work at 5-10ms latency was install a low-latency kernel (from KXStudio) and change buffer and period settings on QJackCtl's non-Advanced settings tab. That's on two different systems: one Intel i7, the other an AMD Phenom 2. No tweaking deadline scheduler or scaling governor (for the Intel, Phenom 2 has no such capability). But I'm using Debian Testing + KXStudio, not ArchLinux or Ubuntu. David W. Jones gnome@xxxxxxxxxxxxx authenticity, honesty, community http://dancingtreefrog.com _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
