30 Oct
2011
30 Oct
'11
12:02 p.m.
Hi,
I am a musician and programmer.
I use a laptop with an internal soundcard (intel)
and ubuntu studo.
When I see the qjack control settings window
I always see a 46.6 ms latency.
On a older Desktop computer with an internal ac97 soundcard
or an pci sweex (cheap) I have the same problem.
Reducing the sample period to 512 , reduces the latency, but
always ends up with problems.
My question is how to have a good studio setup
for recording (and playing midi in the background)?
Is it possible to better the performance with an external soundcard?
What are your experiences?
I also tried ccma an av linux, but the same problems.
Anyone suggestions?
Regards,
Dave Stikkolorum
30 Oct
30 Oct
12:25 p.m.
On 10/30/2011 12:02 PM, Dave Stikkolorum wrote:
Hi,
I am a musician and programmer.
I use a laptop with an internal soundcard (intel)
and ubuntu studo.
When I see the qjack control settings window
I always see a 46.6 ms latency.
On a older Desktop computer with an internal ac97 soundcard
or an pci sweex (cheap) I have the same problem.
Reducing the sample period to 512 , reduces the latency, but
always ends up with problems.
My question is how to have a good studio setup
for recording (and playing midi in the background)?
Is it possible to better the performance with an external soundcard?
What are your experiences?
I also tried ccma an av linux, but the same problems.
Anyone suggestions?
Regards,
Dave Stikkolorum
Hello Dave,
46.4ms is the default JACK latency (1024 frames / 44100 sample rate * 2
periods). You can try lowering it by reducing the number of frames. But
if you get xruns then (buffer errors) then you may need to optimize your
Ubuntu install. You might want to look here:
http://wiki.linuxmusicians.com/doku.php?id=system_configuration
And it's possible to get better performance with an external soundcard,
especially compared to onboard cards and specifically in the case of
ac97 soundcards. The latter just refuse to work at lower latencies (at
least for me). There are quite some soundcards available that yield good
performance and that are compatible with Linux:
http://wiki.linuxaudio.org/wiki/current_audio_gear
For starters could you run cat /proc/asound/cards in a terminal on the
laptop with the Intel soundcard?
Best,
Jeremy
12:55 p.m.
On 30-10-11 12:25, Jeremy Jongepier wrote:
On 10/30/2011 12:02 PM, Dave Stikkolorum wrote:
I certainly will
read that, thnx!
Hi,
I am a musician and programmer.
I use a laptop with an internal soundcard (intel)
and ubuntu studo.
When I see the qjack control settings window
I always see a 46.6 ms latency.
On a older Desktop computer with an internal ac97 soundcard
or an pci sweex (cheap) I have the same problem.
Reducing the sample period to 512 , reduces the latency, but
always ends up with problems.
My question is how to have a good studio setup
for recording (and playing midi in the background)?
Is it possible to better the performance with an external soundcard?
What are your experiences?
I also tried ccma an av linux, but the same problems.
Anyone suggestions?
Regards,
Dave Stikkolorum
Hello Dave,
46.4ms is the default JACK latency (1024 frames / 44100 sample rate *
2 periods). You can try lowering it by reducing the number of frames.
But if you get xruns then (buffer errors) then you may need to
optimize your Ubuntu install. You might want to look here:
http://wiki.linuxmusicians.com/doku.php?id=system_configuration And it's possible to get better performance with
an external
soundcard, especially compared to onboard cards and specifically in
the case of ac97 soundcards. The latter just refuse to work at lower
latencies (at least for me). There are quite some soundcards available
that yield good performance and that are compatible with Linux:
http://wiki.linuxaudio.org/wiki/current_audio_gear
That sounds promising.
For starters could you run cat /proc/asound/cards in a
terminal on the
laptop with the Intel soundcard?
cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xdb320000 irq 47
How much does the processor has influence.
For example I have a 1,8 Ghz Pentium 4 upstairs.
I would like to use both. (one portable studio and one upstairs)
Best,
Jeremy
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1:03 p.m.
On 10/30/2011 12:55 PM, Dave Stikkolorum wrote:
On 30-10-11 12:25, Jeremy Jongepier wrote:
Oops, sorry, I meant cat /proc/asound/card*/codec* | grep -i codec
But thanks!
On 10/30/2011 12:02 PM, Dave Stikkolorum wrote:
I certainly will
read that, thnx!
Hi,
I am a musician and programmer.
I use a laptop with an internal soundcard (intel)
and ubuntu studo.
When I see the qjack control settings window
I always see a 46.6 ms latency.
On a older Desktop computer with an internal ac97 soundcard
or an pci sweex (cheap) I have the same problem.
Reducing the sample period to 512 , reduces the latency, but
always ends up with problems.
My question is how to have a good studio setup
for recording (and playing midi in the background)?
Is it possible to better the performance with an external soundcard?
What are your experiences?
I also tried ccma an av linux, but the same problems.
Anyone suggestions?
Regards,
Dave Stikkolorum
Hello Dave,
46.4ms is the default JACK latency (1024 frames / 44100 sample rate *
2 periods). You can try lowering it by reducing the number of frames.
But if you get xruns then (buffer errors) then you may need to
optimize your Ubuntu install. You might want to look here:
http://wiki.linuxmusicians.com/doku.php?id=system_configuration And it's possible to get better performance
with an external
soundcard, especially compared to onboard cards and specifically in
the case of ac97 soundcards. The latter just refuse to work at lower
latencies (at least for me). There are quite some soundcards available
that yield good performance and that are compatible with Linux:
http://wiki.linuxaudio.org/wiki/current_audio_gear
That sounds promising.
For starters could you run cat /proc/asound/cards
in a terminal on the
laptop with the Intel soundcard?
cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xdb320000 irq 47
How much does the processor has influence.
The lower the latency the more CPU that will consume.
For example I have a 1,8 Ghz Pentium 4 upstairs.
That will work, I'm using JACK with a netbook which has a 1,2Ghz CPU.
But then I quickly hit the limits of what this netbook is capable of.
But I can run a simple session using my Edirol UA-25 USB soundcard with
8ms of system latency.
I would like to use both. (one portable studio and one
upstairs)
That's possible, you're best choice would be USB then assuming not all
your machines have a FireWire connection.
Best,
Jeremy
1:23 p.m.
On 30-10-11 13:03, Jeremy Jongepier wrote:
On 10/30/2011 12:55 PM, Dave Stikkolorum wrote:
cat /proc/asound/card*/codec* | grep -i codec
Codec: Analog Devices AD1984A
Codec: LSI ID 1040
On 30-10-11 12:25, Jeremy Jongepier wrote:
Oops, sorry, I meant cat /proc/asound/card*/codec* | grep -i codec
But thanks! On 10/30/2011 12:02 PM, Dave Stikkolorum wrote:
I certainly will
read that, thnx!
Hi,
I am a musician and programmer.
I use a laptop with an internal soundcard (intel)
and ubuntu studo.
When I see the qjack control settings window
I always see a 46.6 ms latency.
On a older Desktop computer with an internal ac97 soundcard
or an pci sweex (cheap) I have the same problem.
Reducing the sample period to 512 , reduces the latency, but
always ends up with problems.
My question is how to have a good studio setup
for recording (and playing midi in the background)?
Is it possible to better the performance with an external soundcard?
What are your experiences?
I also tried ccma an av linux, but the same problems.
Anyone suggestions?
Regards,
Dave Stikkolorum
Hello Dave,
46.4ms is the default JACK latency (1024 frames / 44100 sample rate *
2 periods). You can try lowering it by reducing the number of frames.
But if you get xruns then (buffer errors) then you may need to
optimize your Ubuntu install. You might want to look here:
http://wiki.linuxmusicians.com/doku.php?id=system_configuration And it's possible to get better performance
with an external
soundcard, especially compared to onboard cards and specifically in
the case of ac97 soundcards. The latter just refuse to work at lower
latencies (at least for me). There are quite some soundcards available
that yield good performance and that are compatible with Linux:
http://wiki.linuxaudio.org/wiki/current_audio_gear
That sounds promising.
For starters could you run cat /proc/asound/cards
in a terminal on the
laptop with the Intel soundcard?
cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xdb320000 irq 47
How much does the processor has influence.
The lower the latency the more CPU that will consume.
For example I have a 1,8 Ghz Pentium 4 upstairs.
That will work, I'm using JACK with a netbook which has a 1,2Ghz CPU.
But then I quickly hit the limits of what this netbook is capable of.
But I can run a simple session using my Edirol UA-25 USB soundcard
with 8ms of system latency.
I would like to use both. (one portable studio
and one upstairs)
That's possible, you're best choice would be USB then assuming not all
your machines have a FireWire connection.
Best,
Jeremy
_______________________________________________
Linux-audio-tuning mailing list
Linux-audio-tuning(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-tuning
2:50 p.m.
On 10/30/2011 01:23 PM, Dave Stikkolorum wrote:
cat /proc/asound/card*/codec* | grep -i codec
Codec: Analog Devices AD1984A
Codec: LSI ID 1040
Hello Dave,
Thanks! That's already a bit of an older onboard soundcard, I am not
sure how it performs when using JACK. I've come accross these AD devices
at work and if I recall correctly it doesn't do a great job. You could
try raising the sample rate to 48000. And are you using Jack1 or Jack2?
You can find that out with the terminal command jackd --version If
you're using Jack2 (so jackd version 1.9.x) you might want to try adding
the -S option to the Server Path line so that it reads /usr/bin/jackd -S
Best,
Jeremy
3:13 p.m.
On 30-10-11 14:50, Jeremy Jongepier wrote:
On 10/30/2011 01:23 PM, Dave Stikkolorum wrote:
I have jack 1.9.7
if I increase to 48000 qjackctl gives 42.7 ms. (21.3 when using 512/period)
how would i see the improvement with /usr/bin/jackd -S ?
it doesn't change the expected latency in qjackctl when I do that.
One of the annoying things is the delay between the midi keyboard
and the actual sound. I guess it has to do with the one we are tuning
now, right?
Dave
cat /proc/asound/card*/codec* | grep -i codec
Codec: Analog Devices AD1984A
Codec: LSI ID 1040
Hello Dave,
Thanks! That's already a bit of an older onboard soundcard, I am not
sure how it performs when using JACK. I've come accross these AD
devices at work and if I recall correctly it doesn't do a great job.
You could try raising the sample rate to 48000. And are you using
Jack1 or Jack2? You can find that out with the terminal command jackd
--version If you're using Jack2 (so jackd version 1.9.x) you might
want to try adding the -S option to the Server Path line so that it
reads /usr/bin/jackd -S
Best,
Jeremy
_______________________________________________
Linux-audio-tuning mailing list
Linux-audio-tuning(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-tuning
3:19 p.m.
On 10/30/2011 03:13 PM, Dave Stikkolorum wrote:
I have jack 1.9.7
if I increase to 48000 qjackctl gives 42.7 ms. (21.3 when using 512/period)
You can decrease the latency by lowering the number of frames. It is now
set to 1024, try 256 or even lower. I use a setting of 64 or 128 when
using a MIDI keyboard with a softsynth or sampler.
how would i see the improvement with /usr/bin/jackd -S
?
it doesn't change the expected latency in qjackctl when I do that.
No that's right. But it might improve performance of JACK regarding
xruns. -S means Synchronous or basically the ol' Jack1 way, some
soundcards work better that way.
One of the annoying things is the delay between the
midi keyboard
and the actual sound. I guess it has to do with the one we are tuning
now, right?
Yes, the lower the latency, the lower the delay between pressing a key
and hearing the actual sound. With a frames setting of 64 at 48Khz
system latency will drop to 2.67 ms (64/48000*2). Those are the kind of
latencies you want when using a MIDI keyboard.
Best,
Jeremy
3:39 p.m.
On 30-10-11 15:19, Jeremy Jongepier wrote:
ok, i see, i will try some stuff later tonight, because I am not having
a setup with a keyboard attached now.
I also will try to find out what my other pci card was on the desktop
Thnx!
Dave
On 10/30/2011 03:13 PM, Dave Stikkolorum wrote:
Ok, you use the realtime option also?
I have jack 1.9.7
if I increase to 48000 qjackctl gives 42.7 ms. (21.3 when using
512/period)
You can decrease the latency by lowering the number of frames. It is
now set to 1024, try 256 or even lower. I use a setting of 64 or 128
when using a MIDI keyboard with a softsynth or sampler.
how would i see the improvement with
/usr/bin/jackd -S ?
it doesn't change the expected latency in qjackctl when I do that.
No that's right. But it might improve performance of JACK regarding
xruns. -S means Synchronous or basically the ol' Jack1 way, some
soundcards work better that way.
One of the
annoying things is the delay between the midi keyboard
and the actual sound. I guess it has to do with the one we are tuning
now, right?
Yes, the lower the latency, the lower the delay between pressing a key
and hearing the actual sound. With a frames setting of 64 at 48Khz
system latency will drop to 2.67 ms (64/48000*2). Those are the kind
of latencies you want when using a MIDI keyboard.
Best,
Jeremy
_______________________________________________
Linux-audio-tuning mailing list
Linux-audio-tuning(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-tuning
31 Oct
31 Oct
12:59 p.m.
On 10/30/2011 03:39 PM, Dave Stikkolorum wrote:
Ok, you
use the realtime option also?
Yes, and if you set the realtime option ame sure to enter a value for
the JACK's priority also. Default is 10 which is a bit low on a scale of
100. Also make sure you have set up JACK to use realtime priorities.
Best,
Jeremy
1 Nov
1 Nov
1:25 a.m.
Hello Everyone,
I'm having a similar problem so I'll take the liberty to jump into this
thread, let me know if I should create a new thread instead.
My laptop is a MacBookPro8,1 with i7 processor, 8GB ram, built-in intel
HDA soundcard, dual boot setup with mac os + jack + ardour and 64 bit
Ubuntu Studio 11.04 + jack + ardour + QTractor.
On MacOS, jack works really well with the default settings:
/usr/local/bin/jackd -R -d coreaudio -p 64 -r 44100 -i 2 -o 2 -C
AppleHDAEngineInput:1B,0,1,0:1 -P AppleHDAEngineOutput:1B,0,1,1:0
But on Ubuntu, the only way I can get sound that sounds clear (no
distortion or clicks) is by setting the "force 16 bit" flag and 4096
frames. I tried some of the troubleshooting guides out there and
compiled the latest version of ALSA but the result was the same. I also
tried AVLinux which comes with a preemptive kernel but still the same :(
Also, If I use ALSA directly on an application that supports it
(pd-extended for example) the latency feels a lot shorter than using
jack with the settings I described (I havent measured it, don't know how).
If it helps, here's the output of cat /proc/asound/card*/codec* | grep
-i codec
Codec: Cirrus Logic CS4206
Codec: Intel CougarPoint HDMI
Has anyone successfully setup this kind of sound card on Linux + Jack?
Any tips on setting up jack?
Thanks!
RV.
On 10/31/2011 06:58 AM, Jeremy Jongepier wrote:
On 10/30/2011 03:39 PM, Dave Stikkolorum wrote:
Ok, you use the realtime option also?
Yes, and if you set the realtime option ame sure to enter a value for
the JACK's priority also. Default is 10 which is a bit low on a scale
of 100. Also make sure you have set up JACK to use realtime priorities.
Best,
Jeremy
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Linux-audio-tuning mailing list
Linux-audio-tuning(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-tuning
11:04 a.m.
Hi Rafael,
My laptop is a MacBookPro8,1 with i7 processor, 8GB
ram, built-in intel
HDA soundcard
For Intel HDA a tweak is often required to get good performance. See:
http://apps.linuxaudio.org/wiki/intel_hda_realtime_howto
Ignore the kernel recompile part, but note the issue with mixer capture
switches if using jackd in full duplex mode.
Codec: Cirrus Logic CS4206
Try adding these options at the end of /etc/modprobe.d/alsa-base.conf
options snd-hda-intel model=mbp55 position_fix=1 enable=1 index=0
The mbp55 value for CS4206 is found near the end of:
http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt
Then reboot and see if JACK performance improves. You should be able to
get 64 frames/period x 3 periods/buffer @ 48KHz on this hardware.
Cheers!
Daniel
3 Nov
3 Nov
1:33 p.m.
Thanks for the input Daniel, I'll try this as soon as I reinstall my OS (messed up
partitions :P)
On Nov 1, 2011, at 5:04 AM, Daniel James wrote:
Hi Rafael,
My laptop is a MacBookPro8,1 with i7 processor,
8GB ram, built-in intel
HDA soundcard
For Intel HDA a tweak is often required to get good performance. See:
http://apps.linuxaudio.org/wiki/intel_hda_realtime_howto
Ignore the kernel recompile part, but note the issue with mixer capture
switches if using jackd in full duplex mode.
Codec: Cirrus Logic CS4206
Try adding these options at the end of /etc/modprobe.d/alsa-base.conf
options snd-hda-intel model=mbp55 position_fix=1 enable=1 index=0
The mbp55 value for CS4206 is found near the end of:
http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt
Then reboot and see if JACK performance improves. You should be able to
get 64 frames/period x 3 periods/buffer @ 48KHz on this hardware.
Cheers!
Daniel
22 Dec
22 Dec
3:49 p.m.
I finally got some spare time to "fix" my system. I installed arch linux
from scratch (3.1 kernel) and the alsa drivers included there work way
better than the ones included in ubuntu studio. The distortion is gone and
the latency is decent (256 samples). Thanks for the input! :)
On Thu, Nov 3, 2011 at 7:33 AM, Rafael Vega <email.rafa(a)gmail.com> wrote:
Thanks for the input Daniel, I'll try this as soon
as I reinstall my OS
(messed up partitions :P)
On Nov 1, 2011, at 5:04 AM, Daniel James wrote:
--
Rafael Vega
email.rafa(a)gmail.com
Hi Rafael,
My laptop is a MacBookPro8,1 with i7 processor,
8GB ram, built-in intel
HDA soundcard
For Intel HDA a tweak is often required to get good performance. See:
http://apps.linuxaudio.org/wiki/intel_hda_realtime_howto
Ignore the kernel recompile part, but note the issue with mixer capture
switches if using jackd in full duplex mode.
Codec: Cirrus Logic CS4206
Try adding these options at the end of /etc/modprobe.d/alsa-base.conf
options snd-hda-intel model=mbp55 position_fix=1 enable=1 index=0
The mbp55 value for CS4206 is found near the end of:
http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt
Then reboot and see if JACK performance improves. You should be able to
get 64 frames/period x 3 periods/buffer @ 48KHz on this hardware.
Cheers!
Daniel
1 Nov
1 Nov
5:17 p.m.
I have now a setup with qsynth and muse
with jack settings:
path: /usr/bin/jackd -S
priority: 70
period/frame: 256
sample rate: 48000
latency is now: 10.7 ms
It is not smooth unfortunately
Dave
On 31-10-11 12:58, Jeremy Jongepier wrote:
On 10/30/2011 03:39 PM, Dave Stikkolorum wrote:
Ok, you use the realtime option also?
Yes, and if you set the realtime option ame sure to enter a value for
the JACK's priority also. Default is 10 which is a bit low on a scale
of 100. Also make sure you have set up JACK to use realtime priorities.
Best,
Jeremy
_______________________________________________
Linux-audio-tuning mailing list
Linux-audio-tuning(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-tuning
2 Nov
2 Nov
6:34 p.m.
On 11/01/2011 05:16 PM, Dave Stikkolorum wrote:
I have now a setup with qsynth and muse
with jack settings:
path: /usr/bin/jackd -S
priority: 70
period/frame: 256
sample rate: 48000
latency is now: 10.7 ms
It is not smooth unfortunately
Dave
Hello Dave,
Could you post the outcome of cat /proc/interrupts ? And what kind of
optimizations did you do already? You could check here:
http://linux.autostatic.com/je-systeem-configureren
Best,
Jeremy
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participants (5)
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Dave Stikkolorum -
email.rafa＠gmail.com -
Jeremy Jongepier -
Rafael Vega