extreme xruns with USB interface (Soundcraft Notepad)

Optimize your system for ultimate performance.

Moderators: MattKingUSA, khz

Post Reply
zettberlin
Established Member
Posts: 118
Joined: Sun Apr 13, 2008 7:21 pm
Location: Celle
Has thanked: 1 time
Been thanked: 1 time
Contact:

extreme xruns with USB interface (Soundcraft Notepad)

Post by zettberlin »

Hello,

I have a problem that seems to be quite low level:

I run Ubuntu20.04 as delivered by Tuxedo Computers with the Ubuntu Studio Extensions(Kernel, setup etc)

I use the Soundcraft Notepad-12 FX Mixer as a USB Interface, works perfectly well OOTB.
Its a capable machine (AMD Ryzen 9 PRO 3900 12-Core Processor, 32G RAM) so I can do a lot without any xruns at settings for <10ms latency, CPU Gov is Performance.

BUT: from time to time, without running large plugins or Ardour projects I get tons of xruns(thousands per second) and dropouts in the whole sound system.

The only info, that may be related from top is:

Code: Select all

444 root     -77   0       0      0      0 R  86,0   0,0 666:31.72    irq/98-xhci_hcd 
other applications perform like this:

Code: Select all

   3081 zettber+  20   0  163360  86908  86024 S  79,7   0,3 437:38.78 zita-a2j                                              
  45118 zettber+  20   0 2394832 520216 235744 S  20,6   1,6 229:44.27 carla                                                 
    394 root     -86   0       0      0      0 S   6,0   0,0 179:16.93 irq/55-xhci_hcd                                       
   2085 root      20   0   24,2g 119160  71912 S   4,3   0,4 140:59.18 Xorg                                                  
   2543 zettber+   9 -11 3091360 106240 100584 S   3,3   0,3  53:51.71 pulseaudio                                            
   2685 zettber+  20   0 3109464 208108 117276 S   3,3   0,6  31:38.16 kwin_x11                                              
   3034 zettber+  20   0  250404  96892  89040 S   2,0   0,3  34:18.73 jackdbus      
Is there anything known about zita-a2j that could cause this?

BTW: I use to have Carla running 24/7 with a light setup of Guitarix and CALF Limiter as a allways on Guitar amp, and not xruns ever, after several days of use...

But when I demand some more and with Synths/MIDI it takes only minutes to a rain of xruns... even with the synths unused running in the background...
nostrum fungitur
Post Reply