Crackling without xruns with RT PREEMPT kernel

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lilith
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Re: Crackling without xruns.. worse with large buffers

Post by lilith »

puleglot wrote: ↑Sat Apr 18, 2020 2:36 pm So this might be a Renoise+Jack specific issue indeed.
Yes, that's my assumption. But it also works with another interface in Renoise (ESI DAC nano). :mrgreen: So it's only one configuration that's not working: Renoise / Jack / Zoom R8.

That's the ESI DAC

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and that's the Zoom

Code: Select all

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puleglot
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Re: Crackling without xruns.. worse with large buffers

Post by puleglot »

lilith wrote: ↑Sat Apr 18, 2020 2:41 pm But it also works with another interface in Renoise (ESI DAC nano).
It has Adaptive endpoints. Adaptive endpoints are usually tolerant to a larger packet rate drifts than Synchronous ones. So maybe Renoise with jack causes some specific load on the system that affects mostly devices with Synchronous endpoints. In this case my suggestion to decrease MAX_PACKS value or even try to apply implicit feedback quirk still stands.
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lilith
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Re: Crackling without xruns.. worse with large buffers

Post by lilith »

puleglot wrote: ↑Sat Apr 18, 2020 2:59 pm
lilith wrote: ↑Sat Apr 18, 2020 2:41 pm But it also works with another interface in Renoise (ESI DAC nano).
It has Adaptive endpoints. Adaptive endpoints are usually tolerant to a larger packet rate drifts than Synchronous ones. So maybe Renoise with jack causes some specific load on the system that affects mostly devices with Synchronous endpoints. In this case my suggestion to decrease MAX_PACKS value or even try to apply implicit feedback quirk still stands.
Ok, thank you, I'll think about it. Then I likely have this issue for years and only now realized it :lol: What about the Behringer U-Phoria USB Interfaces? Do they have a better compatibility or which interface would you recommend?
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Re: Crackling without xruns.. worse with large buffers

Post by puleglot »

lilith wrote: ↑Sat Apr 18, 2020 3:05 pm What about the Behringer U-Phoria USB Interfaces? Do they have a better compatibility or which interface would you recommend?
For the best compatibility with linux you should get an USB audio class compliant interface with Asynchronous endpoints and explicit feedback. So basically any XMOS-based interface excluding Scarlett 3rd Gen and MOTU M2/M4 should work. :) I think Behringer U-Phoria meets this criteria. I have Roland Rubix24 that works without any problems. 2nd Gen Scarlett should be fine (but you can only find them used I think) and a lot of other interfaces in the same generation.
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Re: Crackling without xruns.. worse with large buffers

Post by lilith »

puleglot wrote: ↑Sat Apr 18, 2020 3:23 pm
lilith wrote: ↑Sat Apr 18, 2020 3:05 pm What about the Behringer U-Phoria USB Interfaces? Do they have a better compatibility or which interface would you recommend?
For the best compatibility with linux you should get an USB audio class compliant interface with Asynchronous endpoints and explicit feedback. So basically any XMOS-based interface excluding Scarlett 3rd Gen and MOTU M2/M4 should work. :) I think Behringer U-Phoria meets this criteria. I have Roland Rubix24 that works without any problems. 2nd Gen Scarlett should be fine (but you can only find them used I think) and a lot of other interfaces in the same generation.
Also stumbled over the Roland yesterday, cause you mentioned it. Is it better built than the Behringer and can you recommend it?
So all of these can make problems? https://focusrite.com/en/scarlett I thought the Focusrites are fine. Good that I asked.
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Re: Crackling without xruns.. worse with large buffers

Post by funkmuscle »

lilith wrote: ↑Sat Apr 18, 2020 3:45 pm
puleglot wrote: ↑Sat Apr 18, 2020 3:23 pm
lilith wrote: ↑Sat Apr 18, 2020 3:05 pm What about the Behringer U-Phoria USB Interfaces? Do they have a better compatibility or which interface would you recommend?
For the best compatibility with linux you should get an USB audio class compliant interface with Asynchronous endpoints and explicit feedback. So basically any XMOS-based interface excluding Scarlett 3rd Gen and MOTU M2/M4 should work. :) I think Behringer U-Phoria meets this criteria. I have Roland Rubix24 that works without any problems. 2nd Gen Scarlett should be fine (but you can only find them used I think) and a lot of other interfaces in the same generation.
Also stumbled over the Roland yesterday, cause you mentioned it. Is it better built than the Behringer and can you recommend it?
So all of these can make problems? https://focusrite.com/en/scarlett I thought the Focusrites are fine. Good that I asked.
Nope, I've got a Scarlett 2i2 2nd gen and this popping and crackling and audio slowdown and robotic sounds are driving me sick ass crazy!! It's really pissing me off as I can't work. Edirol UA-25 has the same issue. This all started a few week ago.
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Re: Crackling without xruns.. worse with large buffers

Post by lilith »

funkmuscle wrote: ↑Sat Apr 18, 2020 5:46 pm
lilith wrote: ↑Sat Apr 18, 2020 3:45 pm
puleglot wrote: ↑Sat Apr 18, 2020 3:23 pm
For the best compatibility with linux you should get an USB audio class compliant interface with Asynchronous endpoints and explicit feedback. So basically any XMOS-based interface excluding Scarlett 3rd Gen and MOTU M2/M4 should work. :) I think Behringer U-Phoria meets this criteria. I have Roland Rubix24 that works without any problems. 2nd Gen Scarlett should be fine (but you can only find them used I think) and a lot of other interfaces in the same generation.
Also stumbled over the Roland yesterday, cause you mentioned it. Is it better built than the Behringer and can you recommend it?
So all of these can make problems? https://focusrite.com/en/scarlett I thought the Focusrites are fine. Good that I asked.
Nope, I've got a Scarlett 2i2 2nd gen and this popping and crackling and audio slowdown and robotic sounds are driving me sick ass crazy!! It's really pissing me off as I can't work. Edirol UA-25 has the same issue. This all started a few week ago.
Yes, but I guess that's something different in your case. Can't you go back or try an older kernel?
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Re: Crackling without xruns.. worse with large buffers

Post by puleglot »

lilith wrote: ↑Sat Apr 18, 2020 3:45 pm Also stumbled over the Roland yesterday, cause you mentioned it. Is it better built than the Behringer and can you recommend it?
I don't know. :) I can't compare device that I have with device that I've never had.
lilith wrote: ↑Sat Apr 18, 2020 3:45 pm So all of these can make problems? https://focusrite.com/en/scarlett I thought the Focusrites are fine. Good that I asked.
Yes. Scarlett 3rd gen needs patches for implicit feedback support.
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funkmuscle
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Re: Crackling without xruns.. worse with large buffers

Post by funkmuscle »

Hey, look at my htop results. Could this be the reason I'm getting all that popping and crackling? It says Mixbus is using a lot of cpu. No xruns as the topic says.
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Re: Crackling without xruns.. worse with large buffers

Post by lilith »

funkmuscle wrote: ↑Sun Apr 19, 2020 4:18 pm Hey, look at my htop results. Could this be the reason I'm getting all that popping and crackling? It says Mixbus is using a lot of cpu. No xruns as the topic says.
htop.png
I don't know if that's a problem. The RT priority of this thread is low. Maybe there's another instance of Mixbus running which crashed?
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Re: Crackling without xruns.. worse with large buffers

Post by funkmuscle »

lilith wrote: ↑Sun Apr 19, 2020 4:30 pm
funkmuscle wrote: ↑Sun Apr 19, 2020 4:18 pm Hey, look at my htop results. Could this be the reason I'm getting all that popping and crackling? It says Mixbus is using a lot of cpu. No xruns as the topic says.
htop.png
I don't know if that's a problem. The RT priority of this thread is low. Maybe there's another instance of Mixbus running which crashed?
the weird thing is that the song I'm working on that gave the htop results the Master buss says "Master 1"
Tried other sessions and they all say 'Master"
I'm beginning to think it's Mixbus32C the latest 6.06. Not getting the pops and crackles from Ardour and Reaper as I thought. Ran them for a while without issues.
The other weird thing not being able to set governor which was set before to performance.
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Re: Crackling without xruns.. worse with large buffers

Post by puleglot »

funkmuscle wrote: ↑Sat Apr 18, 2020 5:46 pm Nope, I've got a Scarlett 2i2 2nd gen and this popping and crackling and audio slowdown and robotic sounds are driving me sick ass crazy!!
And you're right! Turned out 2i2 2nd gen and 2i4 2nd gen requires quirks in the driver. Someone sent patch for 2i2 2nd gen today:
https://mailman.alsa-project.org/piperm ... 66479.html
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Re: Crackling without xruns.. worse with large buffers

Post by lilith »

"This also seems to prevent regular clicks when playing at 44100Hz"

I have this too with my interface. So -> new interface or kernel compilation. It's working at 48khz though more or less.

Why are they changeing these things in the kernel??
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Re: Crackling without xruns.. worse with large buffers

Post by lilith »

Did someone delete something here??
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Re: Crackling without xruns.. worse with large buffers

Post by puleglot »

lilith wrote: ↑Mon Apr 20, 2020 9:11 pm Did someone delete something here??
Yes, that was me. :)
lilith wrote: ↑Mon Apr 20, 2020 9:03 pm Why are they changeing these things in the kernel??
I didn't understand this question.
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