Search found 534 matches

by gimmeapill
Wed Apr 03, 2019 8:13 am
Forum: System Tuning and Configuration
Topic: Does anyone write a python JACK patchbay customized for one's own setup?
Replies: 5
Views: 373

Re: Does anyone write a python JACK patchbay customized for one's own setup?

I don't think you need to re-implement something from scratch for switching between jack patchbay presets from a keyboard shortcut. You can do that with qjackctl by using command line switches: " -a, --active-patchbay=[path] Set active patchbay definition file" Then it should be just about...
by gimmeapill
Mon Mar 25, 2019 9:29 am
Forum: System Tuning and Configuration
Topic: Standard test needed to benchmark XRUNs
Replies: 61
Views: 3303

Re: Standard test needed to benchmark XRUNs

Thanks for double checking. So it looks like another configuration setting that could be detected better (although this is really a corner case) - at least we know about it. On my side I didn't have much time for more testing (or to look at the jack API), but I created the project on github: https:/...
by gimmeapill
Fri Mar 22, 2019 11:21 am
Forum: System Tuning and Configuration
Topic: Standard test needed to benchmark XRUNs
Replies: 61
Views: 3303

Re: Standard test needed to benchmark XRUNs

Looking at your results I'd guess your processor is 2.6 GHz. That seems to be the most important factor in how many circles or cycles it takes to cause an Xrun. Quite close ;-) That's an old i5 3317u (Ivy Bridge) than can hardly sustain the max turbo frequency of 2.4 GHz. ...And I think I managed t...
by gimmeapill
Wed Mar 20, 2019 12:07 pm
Forum: System Tuning and Configuration
Topic: Standard test needed to benchmark XRUNs
Replies: 61
Views: 3303

Re: Standard test needed to benchmark XRUNs

xruncounter is very useful, thanks once more for the great job Tramp! And thanks merlyn + Drumfix for the tips about buffersizes and circles: after the tenth read this is finally making it through my thick skull ;-) So let's join the party: Here are some preliminary results on my 5+ y old notebook (...
by gimmeapill
Wed Mar 13, 2019 12:02 pm
Forum: Recorders & Sequencers
Topic: Ardour crash?
Replies: 3
Views: 125

Re: Ardour crash?

No idea what is going on in your case, but that's probably worth reporting:
https://ardour.org/how_to_report_a_bug

Edit: Don't forget to read this as well, or you might end up disappointed.
https://community.ardour.org/support_expectations
by gimmeapill
Wed Jan 23, 2019 8:22 am
Forum: System Tuning and Configuration
Topic: Trying to run 2 jackd, one for Guitarix
Replies: 9
Views: 410

Re: Trying to run 2 jackd, one for Guitarix

Ah, ok. I see very well where's you've been with those resamplers. I'm not going down that rabbit hole again (at least in the current state of technology) - life is just too short ;-) If the need really arise, I'd rather drop Guitarix and use my analog signal chain (I hope Tramp doesn't read this :D...
by gimmeapill
Tue Jan 22, 2019 3:37 pm
Forum: System Tuning and Configuration
Topic: Trying to run 2 jackd, one for Guitarix
Replies: 9
Views: 410

Re: Trying to run 2 jackd, one for Guitarix

Sorry, I meant latency compensation rather that synchronization. But actually in your case it should be exactly the same as recording live guitar straight into a DAW, so nevermind. The resampling however does happen, since you go out of the Guitarix soundcard to the qtracktor soundcard using analog ...
by gimmeapill
Mon Jan 21, 2019 11:25 am
Forum: System Tuning and Configuration
Topic: Trying to run 2 jackd, one for Guitarix
Replies: 9
Views: 410

Re: Trying to run 2 jackd, one for Guitarix

Very nice ;-) I tried it as well a while ago, but with a single audio interface and that didn't go very well: I tried to use Zita-ajbridge to connect both jack instances (possibly also with a loopback, I don't remember very well). The outcome was mostly a flock of xruns - which defeats the original ...
by gimmeapill
Wed Jan 16, 2019 12:14 pm
Forum: System Tuning and Configuration
Topic: cyclictest
Replies: 25
Views: 1233

Re: cyclictest

Interesting results. Even at 540 us worst case latency the stock kernel does quite ok'ish for audio. Regarding those RT results with one core acting up: did you try to run the RT cyclictest with 3 cores? I'm wondering if sacrificing one core wouldn't actually help. It could be also a matter of RT pr...
by gimmeapill
Fri Jan 11, 2019 10:02 am
Forum: System Tuning and Configuration
Topic: cyclictest
Replies: 25
Views: 1233

Re: cyclictest

It's CPU1 (the green line) that's letting the side down. :) The other three CPUs have a really good maximum latency -- around 50 microseconds. That's 0.05 milliseconds. It's interesting that CPU1 is so much worse than the others. Makes you wonder if there's anything tied to CPU1. If there's somethi...
by gimmeapill
Fri Jan 11, 2019 9:55 am
Forum: System Tuning and Configuration
Topic: cyclictest
Replies: 25
Views: 1233

Re: cyclictest

I found also (empirically) that 4.19 RT is exceptionally good, but I have unfortunately not much time to join the benchmark fest. Looking at the results from the old threads on LM, it seems we are getting better: most of the results 2y ago were around 150us, now we're reliably getting below 100us - ...
by gimmeapill
Fri Jan 11, 2019 9:02 am
Forum: System Tuning and Configuration
Topic: One month and counting without RT kernel on Arch Linux
Replies: 24
Views: 1032

Re: One month and counting without RT kernel on Arch Linux

Yeah, Nvidia + RT is not the easiest going combo for audio (although it seems to be working for some people). But it is not up to Arch to delay upgrades to support proprietary drivers - rather the opposite ;-) Anyway, if you want to pitch Linux-ZEN against the latest stock or RT, why not run a few b...
by gimmeapill
Thu Jan 10, 2019 10:29 am
Forum: System Tuning and Configuration
Topic: One month and counting without RT kernel on Arch Linux
Replies: 24
Views: 1032

Re: One month and counting without RT kernel on Arch Linux

I think the Archlinux zen kernel is the way to go. Another plus is that it uses the newer I/O schedules like kyber/mq-deadline/bfq for better multi read/wrrite performance on HDD's. This kernel also has optimized the RCU timer threshold setting for more responsiveness. Attached is a zip I created t...
by gimmeapill
Wed Jan 09, 2019 10:16 am
Forum: System Tuning and Configuration
Topic: One month and counting without RT kernel on Arch Linux
Replies: 24
Views: 1032

Re: One month and counting without RT kernel on Arch Linux

Gimmeapill do you not disable obviously irrelevant stuff in your kernel config? I used to be able to build a trimmed down one in about 10mins on my old core2duo. Yes, I used to, but this became over time a lot more pain than it is worth. I also used to build the spartan way with "make localmod...

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