Re: Do I run a low-latency and realtime kernel?
Hi again, Thanks for the replies !
I suggest to Try the 2.6.16-multimedia kernel that it's into Musix, Also, the 2.6-16-beyond4.1 it's a realtime kernel...
Ok, I'll try the multimedia one.
To try it, start jack and type into a konsole: ps -C jackd -cmL
my output is : PID LWP CLS PRI TTY TIME CMD 14745 - - - ? 00:00:00 jackd - 14745 TS 7 - 00:00:00 - - 14746 TS 34 - 00:00:00 - - 14747 TS 22 - 00:00:00 - - 14748 #4 40 - 00:00:00 - - 14749 #4 40 - 00:00:00 - So, no FF.. Does this mean no realtime kernel or no jackd realtime support?
Julien: is realtime-lsm loaded? Type into a konsole: lsmod | grep realtime
The output from this comand is : realtime 5384 0 commoncap 6912 1 realtime Is this realtime-lsm? (When I do apt-get install realtime-lsm it says it is already installed. But do I have to turn it on? Or it is the above and is ok?)
If you want more evidences: marcos@musix099b16:~$ cat /boot/config-2.6.17-2-multimedia-486 | grep -i realtime CONFIG_SECURITY_REALTIME=m
Mine is : cat /boot/config-2.6.16-beyond4.1 |grep -i realtime CONFIG_SECURITY_REALTIME=m So it seems ok.
Julien, what could be wrong with zynaddsubfx? or does it happends with any other apps? Well, the tons of xruns and sound saturation comes only with zynaddsubfx with that SPECIFIC configuration. That is : midi keyboard -->midi input to freewheeling -->midi output to zynaddsubfx -->audio output back to freewheeling -->audio output to alsa_pcm.
I don't know what is bad with that configuration. May be it is the fact that it makes a kind of loop, and so has to take too much time.. But in general, all soundfonts I use sound crap too. No saturation, but bad sound quality (for that, I don't know, may be I only have bad soundfonts) So..let's summarize. With the commands you made me run, It seems I have realtime kernel and realtime-lsm..but on the other hand, it seems jackd is not realtime..?? Is your advice still to try the 2.16-multimedia? Thanks !
El Lun 09 Abr 2007 23:07, julien bodd escribió: | Hi again, | Thanks for the replies ! | | > I suggest to Try the 2.6.16-multimedia kernel that it's into Musix, | > Also, the 2.6-16-beyond4.1 it's a realtime kernel... | | Ok, I'll try the multimedia one. | | > To try it, start jack and type into a konsole: | > ps -C jackd -cmL | | my output is : | PID LWP CLS PRI TTY TIME CMD | 14745 - - - ? 00:00:00 jackd | - 14745 TS 7 - 00:00:00 - | - 14746 TS 34 - 00:00:00 - | - 14747 TS 22 - 00:00:00 - | - 14748 #4 40 - 00:00:00 - | - 14749 #4 40 - 00:00:00 - | | So, no FF.. Does this mean no realtime kernel or no jackd realtime | support? Some of both | > Julien: is realtime-lsm loaded? | > Type into a konsole: | > lsmod | grep realtime | | The output from this comand is : | realtime 5384 0 | commoncap 6912 1 realtime Well, that confuses me!! Here this kernel works in realtime, maybe there is an unknown bug somewhere! | Is this realtime-lsm? | (When I do apt-get install realtime-lsm it says it is already | installed. But do I have to turn it on? Or it is the above and is ok?) It's ok, it's loaded... maybe it's not loaded fine, try this modprobe -r realtime modprobe realtime any=1 | > If you want more evidences: | > marcos@musix099b16:~$ cat /boot/config-2.6.17-2-multimedia-486 | grep -i | > realtime CONFIG_SECURITY_REALTIME=m | | Mine is : | cat /boot/config-2.6.16-beyond4.1 |grep -i realtime | CONFIG_SECURITY_REALTIME=m | So it seems ok. Yes :) | > Julien, what could be wrong with zynaddsubfx? or does it happends with | > any other apps? | | Well, the tons of xruns and sound saturation comes only with | zynaddsubfx with that SPECIFIC configuration. That is : | midi keyboard -->midi input to freewheeling -->midi output to | zynaddsubfx -->audio output back to freewheeling -->audio output to | alsa_pcm. | | I don't know what is bad with that configuration. May be it is the | fact that it makes a kind of loop, and so has to take too much time.. Maybe... I dont really know... but try another kernel as you said | But in general, all soundfonts I use sound crap too. No saturation, | but bad sound quality (for that, I don't know, may be I only have bad | soundfonts) Yes, I believe... but, if you want to record the output and upload it to some place, we could listen to them | | So..let's summarize. With the commands you made me run, It seems I | have realtime kernel and realtime-lsm..but on the other hand, it seems | jackd is not realtime..?? Maybe, I dont know, JACK is not running in realtime, I think, you must try new kernels | Is your advice still to try the 2.16-multimedia? yes, or 2.6.17-multimedia or 2.6.21-rc4 from Musix | Thanks ! To you | _______________________________________________ | Musix GNU+Linux - www.musix.org.ar | Musix-users mailing list | [email protected] | https://lists.ourproject.org/cgi-bin/mailman/listinfo/musix-users -- Marcos Guglielmetti * Director del desarrollo de Musix GNU+Linux, 100% Software Libre * Colabora: http://www.musix.org.ar/wiki/index.php/Musix1.0tasks * CD Download: (http://www.musix.org.ar/en/) * Videos, programas, etc.: ftp://musix.ourproject.org/pub/musix/ * Reporte de errores: https://www.musix.org.ar/wiki/index.php?title=Problemas-Bugs *IRC: #musix channel on freenode * http://autosus.wordpress.com/ «No te tomes en serio nada que no te haga reír» [un amigo de E. Galeano] ... tampoco sigas al pie de la letra ninguna de estas frases...
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Marcos Guglielmetti