Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
If you start pd in sudo, you have to connect to jack in sudo mode. Thus start jack in sudo (or gksudo for qjackctl).
I advise to use an rt kernel too. See documentation of Ubuntu Studio.
On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia < rafael.raccuia@blindekinder.com> wrote:
Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Don't run programs as root, your system will be as insecure as a windows box... Just allow rt privileges to the audio group, and add yourself to this group. Then start jack with rt privileges. All software linked to Jack will run with -rt.
JACK requires real-time scheduling privileges for reliable, dropout-free operation. The server requests these privileges when running with the -R option.
Most recent distributions use PAM to manage the permissions of users on a relatively granular level. If the file /etc/security/limits.conf exists on your system, it is using PAM. In order to configure PAM such that normal users can run jackd with realtime privileges make sure the following lines exist: @audio - rtprio 99 @audio - memlock unlimited
2010/10/12 Pedro Lopes pedro.lopes@ist.utl.pt:
If you start pd in sudo, you have to connect to jack in sudo mode. Thus start jack in sudo (or gksudo for qjackctl). I advise to use an rt kernel too. See documentation of Ubuntu Studio.
On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia rafael.raccuia@blindekinder.com wrote:
Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-- Pedro Lopes (ongoing MSc) contact: pedro.lopes@ist.utl.pt website: http://web.ist.utl.pt/Pedro.Lopes
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Sorry, I didn't gave a lot of info: -Intel core2duo T9500 (2.6 GHz) -Ubuntu Lucid (32bit), with rt kernel (which is not rt, I never understood this story...) -last pd-ext from repo (which seems to be down since a while). -RME Multiface I /HDSP expresscard
Of course jack run with -R. I repeat I don't have any problem to run application with really good latency: yesterday, I forgot to increase buffer as I worked on a 96000Hz Ardour session... I noticed I was working at 5ms I/O after one hour recording and playing a lot of tracks, and no xrun, no problems... I also think it's not a good Idea to run pd as root... and I suppose other application won't connect to jack if I run it as root also.
I noticed I had two times the @audio config (limits.conf, audio.conf). You'll say: "better twice than nothing"... But maybe it generates a conflict... I try
Le mardi 12 octobre 2010 à 11:50 -0300, Bernardo Barros a écrit :
Don't run programs as root, your system will be as insecure as a windows box... Just allow rt privileges to the audio group, and add yourself to this group. Then start jack with rt privileges. All software linked to Jack will run with -rt.
JACK requires real-time scheduling privileges for reliable, dropout-free operation. The server requests these privileges when running with the -R option.
Most recent distributions use PAM to manage the permissions of users on a relatively granular level. If the file /etc/security/limits.conf exists on your system, it is using PAM. In order to configure PAM such that normal users can run jackd with realtime privileges make sure the following lines exist: @audio - rtprio 99 @audio - memlock unlimited
2010/10/12 Pedro Lopes pedro.lopes@ist.utl.pt:
If you start pd in sudo, you have to connect to jack in sudo mode. Thus start jack in sudo (or gksudo for qjackctl). I advise to use an rt kernel too. See documentation of Ubuntu Studio.
On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia rafael.raccuia@blindekinder.com wrote:
Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-- Pedro Lopes (ongoing MSc) contact: pedro.lopes@ist.utl.pt website: http://web.ist.utl.pt/Pedro.Lopes
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-RME Multiface I /HDSP expresscard
So this (not the pcmcia) works on linux? That's interesting news.
I also do get some xruns now and then when moving around gui object (like selecting a whole lot of objects and moving them around) even with rt kernel, pd run with -rt etc etc... Otherwise it is usually *quite* stable.
Lorenzo
Of course jack run with -R. I repeat I don't have any problem to run application with really good latency: yesterday, I forgot to increase buffer as I worked on a 96000Hz Ardour session... I noticed I was working at 5ms I/O after one hour recording and playing a lot of tracks, and no xrun, no problems... I also think it's not a good Idea to run pd as root... and I suppose other application won't connect to jack if I run it as root also.
I noticed I had two times the @audio config (limits.conf, audio.conf). You'll say: "better twice than nothing"... But maybe it generates a conflict... I try
Le mardi 12 octobre 2010 à 11:50 -0300, Bernardo Barros a écrit :
Don't run programs as root, your system will be as insecure as a windows box... Just allow rt privileges to the audio group, and add yourself to this group. Then start jack with rt privileges. All software linked to Jack will run with -rt.
JACK requires real-time scheduling privileges for reliable, dropout-free operation. The server requests these privileges when running with the -R option.
Most recent distributions use PAM to manage the permissions of users on a relatively granular level. If the file /etc/security/limits.conf exists on your system, it is using PAM. In order to configure PAM such that normal users can run jackd with realtime privileges make sure the following lines exist: @audio - rtprio 99 @audio - memlock unlimited
2010/10/12 Pedro Lopespedro.lopes@ist.utl.pt:
If you start pd in sudo, you have to connect to jack in sudo mode. Thus start jack in sudo (or gksudo for qjackctl). I advise to use an rt kernel too. See documentation of Ubuntu Studio.
On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia rafael.raccuia@blindekinder.com wrote:
Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-- Pedro Lopes (ongoing MSc) contact: pedro.lopes@ist.utl.pt website: http://web.ist.utl.pt/Pedro.Lopes
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
tried with just one security config, no changes...
Lorenzo a écrit :
-RME Multiface I /HDSP expresscard
So this (not the pcmcia) works on linux? That's interesting news.
OT: it should... I asked on many forums to be sure it does, and people said me "it's basically the same as pcmcia"... but I have a lot of trouble: freeze on boot 9/10... but 1/10, when it works it works pretty good! It could be a hardware issue (my computer). I'm talking with a RME technician to fix it, or almost know where the problem comes from...
I also do get some xruns now and then when moving around gui object (like selecting a whole lot of objects and moving them around) even with rt kernel, pd run with -rt etc etc... Otherwise it is usually *quite* stable.
Lorenzo
Of course jack run with -R. I repeat I don't have any problem to run application with really good latency: yesterday, I forgot to increase buffer as I worked on a 96000Hz Ardour session... I noticed I was working at 5ms I/O after one hour recording and playing a lot of tracks, and no xrun, no problems... I also think it's not a good Idea to run pd as root... and I suppose other application won't connect to jack if I run it as root also.
I noticed I had two times the @audio config (limits.conf, audio.conf). You'll say: "better twice than nothing"... But maybe it generates a conflict... I try
Le mardi 12 octobre 2010 à 11:50 -0300, Bernardo Barros a écrit :
Don't run programs as root, your system will be as insecure as a windows box... Just allow rt privileges to the audio group, and add yourself to this group. Then start jack with rt privileges. All software linked to Jack will run with -rt.
JACK requires real-time scheduling privileges for reliable, dropout-free operation. The server requests these privileges when running with the -R option.
Most recent distributions use PAM to manage the permissions of users on a relatively granular level. If the file /etc/security/limits.conf exists on your system, it is using PAM. In order to configure PAM such that normal users can run jackd with realtime privileges make sure the following lines exist: @audio - rtprio 99 @audio - memlock unlimited
2010/10/12 Pedro Lopespedro.lopes@ist.utl.pt:
If you start pd in sudo, you have to connect to jack in sudo mode. Thus start jack in sudo (or gksudo for qjackctl). I advise to use an rt kernel too. See documentation of Ubuntu Studio.
On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia rafael.raccuia@blindekinder.com wrote:
Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-- Pedro Lopes (ongoing MSc) contact: pedro.lopes@ist.utl.pt website: http://web.ist.utl.pt/Pedro.Lopes
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management ->
http://lists.puredata.info/listinfo/pd-list
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
I still have a lot of DIO errors... no idea how to manage that? "I also do get some xruns now and then when moving around gui object" I have a lot (1 every 30 sec when I don't touch nothing, more if I play with a patch), and they are really audibles... r
Raphael Raccuia a écrit :
tried with just one security config, no changes...
Lorenzo a écrit :
-RME Multiface I /HDSP expresscard
So this (not the pcmcia) works on linux? That's interesting news.
OT: it should... I asked on many forums to be sure it does, and people said me "it's basically the same as pcmcia"... but I have a lot of trouble: freeze on boot 9/10... but 1/10, when it works it works pretty good! It could be a hardware issue (my computer). I'm talking with a RME technician to fix it, or almost know where the problem comes from...
I also do get some xruns now and then when moving around gui object (like selecting a whole lot of objects and moving them around) even with rt kernel, pd run with -rt etc etc... Otherwise it is usually *quite* stable.
Lorenzo
Of course jack run with -R. I repeat I don't have any problem to run application with really good latency: yesterday, I forgot to increase buffer as I worked on a 96000Hz Ardour session... I noticed I was working at 5ms I/O after one hour recording and playing a lot of tracks, and no xrun, no problems... I also think it's not a good Idea to run pd as root... and I suppose other application won't connect to jack if I run it as root also.
I noticed I had two times the @audio config (limits.conf, audio.conf). You'll say: "better twice than nothing"... But maybe it generates a conflict... I try
Le mardi 12 octobre 2010 à 11:50 -0300, Bernardo Barros a écrit :
Don't run programs as root, your system will be as insecure as a windows box... Just allow rt privileges to the audio group, and add yourself to this group. Then start jack with rt privileges. All software linked to Jack will run with -rt.
JACK requires real-time scheduling privileges for reliable, dropout-free operation. The server requests these privileges when running with the -R option.
Most recent distributions use PAM to manage the permissions of users on a relatively granular level. If the file /etc/security/limits.conf exists on your system, it is using PAM. In order to configure PAM such that normal users can run jackd with realtime privileges make sure the following lines exist: @audio - rtprio 99 @audio - memlock unlimited
2010/10/12 Pedro Lopespedro.lopes@ist.utl.pt:
If you start pd in sudo, you have to connect to jack in sudo mode. Thus start jack in sudo (or gksudo for qjackctl). I advise to use an rt kernel too. See documentation of Ubuntu Studio.
On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia rafael.raccuia@blindekinder.com wrote:
Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-- Pedro Lopes (ongoing MSc) contact: pedro.lopes@ist.utl.pt website: http://web.ist.utl.pt/Pedro.Lopes
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management ->
http://lists.puredata.info/listinfo/pd-list
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
I had problems with xruns using the nouveau driver, the nvidia driver improved performance here. Hope that this helps.
2010/10/18 Raphael Raccuia rafael.raccuia@blindekinder.com:
I still have a lot of DIO errors... no idea how to manage that? "I also do get some xruns now and then when moving around gui object" I have a lot (1 every 30 sec when I don't touch nothing, more if I play with a patch), and they are really audibles... r
Raphael Raccuia a écrit :
tried with just one security config, no changes...
Lorenzo a écrit :
-RME Multiface I /HDSP expresscard
So this (not the pcmcia) works on linux? That's interesting news.
OT: it should... I asked on many forums to be sure it does, and people said me "it's basically the same as pcmcia"... but I have a lot of trouble: freeze on boot 9/10... but 1/10, when it works it works pretty good! It could be a hardware issue (my computer). I'm talking with a RME technician to fix it, or almost know where the problem comes from...
I also do get some xruns now and then when moving around gui object (like selecting a whole lot of objects and moving them around) even with rt kernel, pd run with -rt etc etc... Otherwise it is usually *quite* stable.
Lorenzo
Of course jack run with -R. I repeat I don't have any problem to run application with really good latency: yesterday, I forgot to increase buffer as I worked on a 96000Hz Ardour session... I noticed I was working at 5ms I/O after one hour recording and playing a lot of tracks, and no xrun, no problems... I also think it's not a good Idea to run pd as root... and I suppose other application won't connect to jack if I run it as root also.
I noticed I had two times the @audio config (limits.conf, audio.conf). You'll say: "better twice than nothing"... But maybe it generates a conflict... I try
Le mardi 12 octobre 2010 à 11:50 -0300, Bernardo Barros a écrit :
Don't run programs as root, your system will be as insecure as a windows box... Just allow rt privileges to the audio group, and add yourself to this group. Then start jack with rt privileges. All software linked to Jack will run with -rt.
JACK requires real-time scheduling privileges for reliable, dropout-free operation. The server requests these privileges when running with the -R option.
Most recent distributions use PAM to manage the permissions of users on a relatively granular level. If the file /etc/security/limits.conf exists on your system, it is using PAM. In order to configure PAM such that normal users can run jackd with realtime privileges make sure the following lines exist: @audio - rtprio 99 @audio - memlock unlimited
2010/10/12 Pedro Lopespedro.lopes@ist.utl.pt:
If you start pd in sudo, you have to connect to jack in sudo mode. Thus start jack in sudo (or gksudo for qjackctl). I advise to use an rt kernel too. See documentation of Ubuntu Studio.
On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia rafael.raccuia@blindekinder.com wrote:
> > Hi list, > I tested Pd rt as I need low latency for a performance next week... > It seems -rt flag doesn't have any effect. I measured Pd latency with > jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower > I > set buffer in jack (no less than 256), more DIO errors I get... and > there are a lot! This setting works great with many application > (Ardour...), with about 10ms (~15 really). So I would have ~25ms, > which > is acceptable, but too many DIO errors! > > -what is -defeatrt setting? (I tried 0 and 1, no change) > -why is -rt flag without effect? > -tried nosleep, no change... > > I also tried to start pd in root (sudo)... > > It says: > priority 8 scheduling enabled. > priority 6 scheduling enabled. > (which I normally don't have) > > but unfortunately can't connect to jack (state 17) > > thank's for your help > > > _______________________________________________ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list >
-- Pedro Lopes (ongoing MSc) contact: pedro.lopes@ist.utl.pt website: http://web.ist.utl.pt/Pedro.Lopes
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
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I use nvidia... What is considered as an acceptable latency in pure data? As I said, I have about 13ms @ 48000... but these DIO errors too...
Bernardo Barros a écrit :
I had problems with xruns using the nouveau driver, the nvidia driver improved performance here. Hope that this helps.
2010/10/18 Raphael Raccuia rafael.raccuia@blindekinder.com:
I still have a lot of DIO errors... no idea how to manage that? "I also do get some xruns now and then when moving around gui object" I have a lot (1 every 30 sec when I don't touch nothing, more if I play with a patch), and they are really audibles... r
Raphael Raccuia a écrit :
tried with just one security config, no changes...
Lorenzo a écrit :
-RME Multiface I /HDSP expresscard
So this (not the pcmcia) works on linux? That's interesting news.
OT: it should... I asked on many forums to be sure it does, and people said me "it's basically the same as pcmcia"... but I have a lot of trouble: freeze on boot 9/10... but 1/10, when it works it works pretty good! It could be a hardware issue (my computer). I'm talking with a RME technician to fix it, or almost know where the problem comes from...
I also do get some xruns now and then when moving around gui object (like selecting a whole lot of objects and moving them around) even with rt kernel, pd run with -rt etc etc... Otherwise it is usually *quite* stable.
Lorenzo
Of course jack run with -R. I repeat I don't have any problem to run application with really good latency: yesterday, I forgot to increase buffer as I worked on a 96000Hz Ardour session... I noticed I was working at 5ms I/O after one hour recording and playing a lot of tracks, and no xrun, no problems... I also think it's not a good Idea to run pd as root... and I suppose other application won't connect to jack if I run it as root also.
I noticed I had two times the @audio config (limits.conf, audio.conf). You'll say: "better twice than nothing"... But maybe it generates a conflict... I try
Le mardi 12 octobre 2010 à 11:50 -0300, Bernardo Barros a écrit :
Don't run programs as root, your system will be as insecure as a windows box... Just allow rt privileges to the audio group, and add yourself to this group. Then start jack with rt privileges. All software linked to Jack will run with -rt.
JACK requires real-time scheduling privileges for reliable, dropout-free operation. The server requests these privileges when running with the -R option.
Most recent distributions use PAM to manage the permissions of users on a relatively granular level. If the file /etc/security/limits.conf exists on your system, it is using PAM. In order to configure PAM such that normal users can run jackd with realtime privileges make sure the following lines exist: @audio - rtprio 99 @audio - memlock unlimited
2010/10/12 Pedro Lopespedro.lopes@ist.utl.pt:
> If you start pd in sudo, you have to connect to jack in sudo mode. > Thus > start jack in sudo (or gksudo for qjackctl). > I advise to use an rt kernel too. See documentation of Ubuntu Studio. > > On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia > rafael.raccuia@blindekinder.com wrote: > >
>> Hi list, >> I tested Pd rt as I need low latency for a performance next week... >> It seems -rt flag doesn't have any effect. I measured Pd latency with >> jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower >> I >> set buffer in jack (no less than 256), more DIO errors I get... and >> there are a lot! This setting works great with many application >> (Ardour...), with about 10ms (~15 really). So I would have ~25ms, >> which >> is acceptable, but too many DIO errors! >> >> -what is -defeatrt setting? (I tried 0 and 1, no change) >> -why is -rt flag without effect? >> -tried nosleep, no change... >> >> I also tried to start pd in root (sudo)... >> >> It says: >> priority 8 scheduling enabled. >> priority 6 scheduling enabled. >> (which I normally don't have) >> >> but unfortunately can't connect to jack (state 17) >> >> thank's for your help >> >> >> _______________________________________________ >> Pd-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> >>
> -- > Pedro Lopes (ongoing MSc) > contact: pedro.lopes@ist.utl.pt > website: http://web.ist.utl.pt/Pedro.Lopes > > _______________________________________________ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > > > >
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What OS do you use? You need a rt kernel in order to get low latency (assuming your computer reasonably recent).
2010/10/12 Raphael Raccuia rafael.raccuia@blindekinder.com
Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
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Bernardo Barros -
Lorenzo -
Pedro Lopes -
Pierre Massat -
Raphael Raccuia