Search found 376 matches

by Jack Winter
Wed Jun 19, 2019 2:26 pm
Forum: Computer Related Hardware
Topic: USB Audio Interface JACK Xruns on Linux but not on Windows
Replies: 50
Views: 1404

Re: USB Audio Interface JACK Xruns on Linux but not on Windows

If it's related to a spike in CPU use, try disabling hyperthreading. I've seen a scenario where xorg spiking on a cpu caused xruns at low latency in reaper. It went away when disabling SMT.
by Jack Winter
Thu Jun 06, 2019 9:54 am
Forum: System Tuning and Configuration
Topic: Worse performance when power supply plugged in!
Replies: 50
Views: 1488

Re: Worse performance when power supply plugged in!

No thermal shutdown msgs in the output of dmesg? ;) This is a really curious problem. According to the cyclictest/hwlatdetect results there are no problems with kernel scheduling nor with NMI/SMIs. I'd suggest though to run both for a longer time. Run cyclictest during an entire cycle of, on battery...
by Jack Winter
Thu Jun 06, 2019 9:43 am
Forum: Computer Related Hardware
Topic: USB Audio Interface JACK Xruns on Linux but not on Windows
Replies: 50
Views: 1404

Re: USB Audio Interface JACK Xruns on Linux but not on Windows

Setting the priority of the interrupt is probably easiest done by an utility called rtirq. This is what most people use. I'm a little bit loath at going into details as it's a long discussion if you get into the details of it all. The basic idea is to configure the system so that the interrupt for t...
by Jack Winter
Tue Jun 04, 2019 8:34 am
Forum: System Tuning and Configuration
Topic: Worse performance when power supply plugged in!
Replies: 50
Views: 1488

Re: Worse performance when power supply plugged in!

I meant that maybe i7z could help to show some relation ship between xruns and C/P states, cpu temp, cpu freqs, etc.

I'm still curious if you see any thermal events in the output of dmesg.. :)
by Jack Winter
Sun Jun 02, 2019 3:37 pm
Forum: System Tuning and Configuration
Topic: Worse performance when power supply plugged in!
Replies: 50
Views: 1488

Re: Worse performance when power supply plugged in!

I have gotten cyclictest to work (with smi), too: sudo cyclictest -m -Sp98 -i100 -d0 --smi [sudo] # /dev/cpu_dma_latency set to 0us policy: fifo: loadavg: 1.70 1.59 1.38 2/591 7902 T: 0 ( 7897) P:98 I:100 C: 222798 Min: 1 Act: 3 Avg: 3 Max: 19 SMI: 0 T: 1 ( 7898) P:98 I:100 C: 222746 Min: 1 Act: 6 ...
by Jack Winter
Sun Jun 02, 2019 8:34 am
Forum: Computer Related Hardware
Topic: USB Audio Interface JACK Xruns on Linux but not on Windows
Replies: 50
Views: 1404

Re: USB Audio Interface JACK Xruns on Linux but not on Windows

Do you have the possibility to try with an onboard intel GPU? IME, nvidia with the lowlatency kernel has quite a lot of delay in the kernel thread scheduling. Also make sure that you set the priorities right for your soundcard (usb hub) interrupt and audio threads (so that they don't get interrupted...
by Jack Winter
Sat May 18, 2019 6:58 am
Forum: Plugins, Effects and Instruments
Topic: Installing Komplete / Native Access
Replies: 5
Views: 318

Re: Installing Komplete / Native Access

It shouldn't add any latency. Due to switching between processes and needing to transfer data from one process to another, it will take longer to calculate the audio data though. This will increase the DSP load, so might mean that you have to use a bigger buffer size to avoid xruns. IMO using window...
by Jack Winter
Wed May 15, 2019 7:53 am
Forum: System Tuning and Configuration
Topic: How can I eliminate pop sounds from alsa_in and zita-a2j working on ALSA loopback?
Replies: 52
Views: 1805

Re: How can I eliminate pop sounds from alsa_in and zita-a2j working on ALSA loopback?

Did you try the builtin clients instead of alsa_in/out? On JACK1 the -A parameter and on JACK2 the audioadapter client? No idea if they would work better, but maybe worth a try.
by Jack Winter
Tue May 14, 2019 7:49 am
Forum: System Tuning and Configuration
Topic: How can I eliminate pop sounds from alsa_in and zita-a2j working on ALSA loopback?
Replies: 52
Views: 1805

Re: How can I eliminate pop sounds from alsa_in and zita-a2j working on ALSA loopback?

crocket wrote:My user belongs to realtime group and audio group.


If you are on archlinux I don't think you need the audio group at all. In fact I think it conflicts with per-seat access to the soundcard, though I doubt that it has any practical consequences.
by Jack Winter
Sun May 12, 2019 8:06 pm
Forum: Plugins, Effects and Instruments
Topic: Dragonfly Room Reverb - Testers needed
Replies: 72
Views: 2791

Re: Dragonfly Room Reverb - Testers needed

The RT CPU measurement has little to do with the CPU measurement, RT CPU is similar to JACK's DSP load, that is to say that it measures how much of the time available to process the audio was actually used.
by Jack Winter
Sun May 12, 2019 3:58 pm
Forum: System Tuning and Configuration
Topic: How can I eliminate pop sounds from alsa_in and zita-a2j working on ALSA loopback?
Replies: 52
Views: 1805

Re: How can I eliminate pop sounds from alsa_in and zita-a2j working on ALSA loopback?

A couple of years ago I spent quite a bit of time on this, and never managed it to be xrun free. Nowadays I use the pulse to jack bridge instead :) YMMV and all that.. :) Something to try might be to test the internal clients of JACK1/JACK2 to bridge to other soundcards. In the case of JACK1 check o...
by Jack Winter
Sun May 12, 2019 10:11 am
Forum: Plugins, Effects and Instruments
Topic: Dragonfly Room Reverb - Testers needed
Replies: 72
Views: 2791

Re: Dragonfly Room Reverb - Testers needed

In Renoise I get now ~+3 % DSP Load (Jack) with Dragonfly Reverb and +9% with Room. In Reaper I get +0% for Reverb and +0.1% for Room. :shock: @James: What are your numbers now? Strange that it's much worse in Renoise. That's most likely because of reaper's "anticipative fx processing". R...
by Jack Winter
Fri May 03, 2019 11:18 pm
Forum: System Tuning and Configuration
Topic: Standard test needed to benchmark XRUNs
Replies: 130
Views: 6123

Re: Standard test needed to benchmark XRUNs

merlyn wrote:Your graphics is i915?

Code: Select all

root       336   336     2  90     50 [irq/32-i915]


the irq/* threads normally run at priority 50.

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