jack fuzzing

  • nicolab80
Posted: Wed, 10/10/2007 - 14:39
Dear 64Studio people, I've beel suffering a serious problem with the jack server for a long time and I'm not able to solve it!! Often jackd goes crazy and starts to sound in a fuzzy-cracky-distorded way (My English isn't good I can't explain better!!!). It does it when I have more than one application in execution and expecially (but NOT only) with zynaddsubsfx, jack-rack, xmms (with jack output), rosegarden and ardour!!! I think that's not a performance problem, because with all those apps running simultaneously with in full duplex mode, the gkrellm sensors hardly displays more than 40% in the cpu's graph and I have no xruns. I've got a Dell Dimension 5150 with a Debian etch modified with the 64Studio repos, I compiled myself a 2.6.22.1 kernel with the realtime preemption patch (it works great), and I've also compiled in the debian way mosto of the audio packages (alsa base, all of jack, rosegarden, ardour, hydrogen, zynaddsubsfx, fluidsynth and more). I've also tried a little program called set_rlimits, that let you set nice and realtime prio for every app (like the /etc/security/limits.conf). I tried 64Studio 2.0 (install version with no modifications), Musix and Ubuntu Studio, but they works even worst!!! Have anybody any suggestion? I have a second question: How can I compile Ardour in the debian way with VST support? Nicola

yes, i am willing to

  • capoeira
  • 05/01/09
  • Sat, 06/27/2009 - 15:42
yes, i am willing to experiment, as i am forced to do so. lol. and i am experimenting very much. and this is part of my systematicly upgrading. f.e. if some day i can buy a pci-soundcard i can still use my Duo as mic-preamp/xlr adaptor

M-Audio Duo

  • Quentin Harley
  • 05/24/07
  • Sat, 06/27/2009 - 11:06
It is possible to get acceptable results out of USB if you are willing to experiment, and systematically upgrade your other hardware. When I started out I recorded on home made mics, mic preamps and a couple of 2nd hand Sony minidisk recorders...

"USB is a very handy

  • capoeira
  • 05/01/09
  • Sat, 06/27/2009 - 03:20
"USB is a very handy expansion port in that is it is cheap to implement component wise inside your computer. As always there is a trade-off. Less components means that your CPU works harder, and when the CPU works harder latency goes up" i didn't understand that. less components - more CPU-work? "For Pro or High end Amateur work I would always reccomend getting a nice big quiet or silent desktop ot server PC case, with multichannel PCI or PCIe audio hardware. For best results go for solutions where the actual audio never enters the PC case - TOSLINK ADAT is a good solution, combined with an external ADAT audio interface or ADAT enabled mixer." the reason i use this usb-device (M-Audio Duo) is that i don't have money, bought that Duo for a very good price, and as it is a mic-preamp with phantom-power too, it was a economic decision (a pre-amp-device would cost the price of the duo i payed). the duo even has a S/PDIF out, but no in :-( i am still learning how to use the Duo correctly

USB Sound

  • Quentin Harley
  • 05/24/07
  • Fri, 06/26/2009 - 20:10
USB is a very handy expansion port in that is it is cheap to implement component wise inside your computer. As always there is a trade-off. Less components means that your CPU works harder, and when the CPU works harder latency goes up. For Pro or High end Amateur work I would always reccomend getting a nice big quiet or silent desktop ot server PC case, with multichannel PCI or PCIe audio hardware. For best results go for solutions where the actual audio never enters the PC case - TOSLINK ADAT is a good solution, combined with an external ADAT audio interface or ADAT enabled mixer. Of course all home studio's are not created equal, and USB audio devices can deliver good results if used wisely. I am not the right one to ask though, as I went for the option above...

i only have this problem

  • capoeira
  • 05/01/09
  • Fri, 06/26/2009 - 18:20
i only have this problem with my USB-soundcard :-( oboard works. sucks

i have that distorsion often

  • capoeira
  • 05/01/09
  • Tue, 06/16/2009 - 17:19
i have that distorsion often using wine sometimes changing Frames/Period helps, but depending on the app/vst that makes some vst's unusuable due to latency :-( also runing audacity together with rosegarden causes this. 64s 3.0 b

Same answer as JACK distortion I guess

  • jaywilson
  • 06/02/07
  • Thu, 05/28/2009 - 21:54
In JACK Setup set Frames/Period to 32 and increase Period/Buffer slightly.

jackdmp

  • scribe63
  • 09/13/07
  • Fri, 01/04/2008 - 02:51
I eventually found it in the 64studio repos as you staed, just wasn't finding it on my debian etch system which is connected to the 64 studio for some reason. Hence my post. It installs and automatically configures it self, with the symlink as /usr/bin/jackd. Just gave it a test run and ran into a weird issue while using it with ardour. Qjackctl starts up with no issue, ardour starts up also, but in the process of playing back more than one audio session the red playhead will not go back to 00:00:00:00. It's stuck in the middle of the session and wouldn't budge, and no errors in messages. I uninstalled jackdmp and i do not have that issue with jackd. I was using /usr/bin/jackd -R -dalsa -dhw:0 -r 44100 -p1024 -n3 -s Did you experience that or know what may have been the cause. Any thoughts. jawara

Patrice, Thanks for the

  • scribe63
  • 09/13/07
  • Wed, 01/02/2008 - 22:04
Patrice, Thanks for the pointer, willing to try out. Do you know where can i get jackdmp deb package to install on 64studio 32 bit, did you, or do i have to, build from src. TIA jawara

It is on 64Studio repository (stable)

  • Patrice Brousseau
  • 06/04/07
  • Thu, 01/03/2008 - 03:50
Hi, Jackdmp can be found on the 64Studio main repository (stable) via Synaptic. It replace jackd automatically so there's nothing to configure...

Same for me...

  • Patrice Brousseau
  • 06/04/07
  • Wed, 01/02/2008 - 04:06
I had the same problem using jackd so I switched to jackdmp and no more fuzzing. When it happened, there were no xruns, just the sound that become distorted. Mainly when I was using fst or dssi-vst with Rosegarden at low buffer size. I tried a couple of things: rtirq, pci latencies, different versions of Wine and jackd, none worked so far apart the switch to jackdmp. This is with an Echo Mia, Gigabyte K8U-939 and an Athlon 3800+ dual-core. My AGP card is a Matrox G450.

Annoying Fuzzy/Distortions

  • scribe63
  • 09/13/07
  • Tue, 01/01/2008 - 20:18
I'm having this same annoying fuzzy/distortion issue also. It happens when i'm using multiple zynaddsubfx along with qjackctl, hydrogen, and museseq. There are several different scenarios when it happens: 1. On startup of zynaddsubfx instrument module. 2. If i change any parameters in museseq, while simultaneously playing back tracks. 3. Out of the clear blue, usually have stop and restart zynaddsubfx instrument module. This also happens with hydrogen. To avoid it i always have to start hydrogen first after qjackctl and before zynaddsubfx. Sometime to get rid i have to stop everything, including qjackctl, and start over. Hardware Specs. Processor: Dual Xeon 2.0 Ghz Memory: 2 GB Ram Soundcard: M-Audio Delta 66 Graphics: Matrox Millennium P650 Would like to know what causes this and how to fix it also. Any help kindly appreciated. jawara

Sounds familiar

  • sydb
  • 06/05/07
  • Wed, 10/10/2007 - 16:42
I used to get this and it drove me insane. I can't really remember last time it happened, but I was using an Athlon XP with a soundblaster audigy and running DeMuDi. Now I'm using a quad Opteron with an m-audio delta and running 64 Studio. I also stopped using Rosegarden for various reasons, I use seq24 instead but it's not really suited for "traditional" songwriting in the way Rosegarden is. But I used to get this problem just running zynaddsubfx through Jack and controlling with the built in virtual keyboard. I don't think I got it when bypassing Jack. Basically, I sympathise but can't help! Just bored at work :-) Why are you using your own kernel? What's wrong with 64 Studio's? Try that. -- Michael Pacey

There's nothing wrong with

  • nicolab80
  • 10/10/07
  • Thu, 10/11/2007 - 14:26
There's nothing wrong with the 64 Studio's kernel, I just built my own one for my pc's architecture (P4 smp). I've got a Soundblaster too (Card: Ensoniq AudioPCI Chip: Cirrus Logic CS4297A rev 3), now I'm wondering if IT is the problem, so I've got another question: Have anybody shipped with creative cards the same problem? Nicola