Hi List,
What is the best recipe for low latency, using a laptop with no ieee1394 (firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio buffer
size and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency tutorial, nice reading]
I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no ieee1394 (firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
H4?
By whom? Metastudio 4 for Pure Data - coming soon!!
From: Pedro Lopes pedro.lopes@ist.utl.pt To: Ed Kelly morph_2016@yahoo.co.uk Cc: PD List pd-list@iem.at Sent: Fri, 17 September, 2010 16:03:36 Subject: Re: [PD] Latency
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio buffer size
and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency tutorial, nice reading]
I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no ieee1394 (firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
this sh*tty recorder =P
http://www.samsontech.com/products/productpage.cfm?prodid=1901
http://www.samsontech.com/products/productpage.cfm?prodid=1901Works as soundcard, nice (low) latency. I wish I could use my Motu on Linux... wish. Bad choice for open source, MOTU is hostile.
On Fri, Sep 17, 2010 at 4:08 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
H4?
By whom?
Metastudio 4 for Pure Data - coming soon!!
*From:* Pedro Lopes pedro.lopes@ist.utl.pt *To:* Ed Kelly morph_2016@yahoo.co.uk *Cc:* PD List pd-list@iem.at *Sent:* Fri, 17 September, 2010 16:03:36 *Subject:* Re: [PD] Latency
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio buffer
size and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency tutorial, nice reading]
I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no ieee1394 (firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
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
some people reported good results with FFADO + MOTU on Linux. Check the latest version and report back to us :-)
2010/9/17 Pedro Lopes pedro.lopes@ist.utl.pt:
this sh*tty recorder =P http://www.samsontech.com/products/productpage.cfm?prodid=1901 Works as soundcard, nice (low) latency. I wish I could use my Motu on Linux... wish. Bad choice for open source, MOTU is hostile.
On Fri, Sep 17, 2010 at 4:08 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
H4? By whom?
Metastudio 4 for Pure Data - coming soon!!
From: Pedro Lopes pedro.lopes@ist.utl.pt To: Ed Kelly morph_2016@yahoo.co.uk Cc: PD List pd-list@iem.at Sent: Fri, 17 September, 2010 16:03:36 Subject: Re: [PD] Latency
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio buffer
size and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency tutorial, nice reading] I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no ieee1394 (firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
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
-- 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
some people reported good results with FFADO + MOTU on Linux.
Not my MOTU :) I've tried FFADO but thanks for the reminder anyway. The previous "firmware" MOTUS definitely work on Linux, not Ultralike Mk3 still. The latest report (very recent) is [1]
[1] Update, 2 September 2010: audio streaming has been demonstrated on some of these G3 interfaces over the past few months, which means jackd can be used to get audio into and out of these interfaces under certain conditions (when testing this please make sure you're using the most recent svn snapshot available - r1882 or later). There is a report that the Ultralite Mk3 and the Ultralite hybrid (in firewire mode) are mostly working. The 828 Mk3 streams audio for most combinations of optical port mode settings (although some are yet to be tested). The Traveler Mk3 streams audio at all sample rates so long as the optical ports are turned off. Work is continuing on making the optical port support better on the G3 devices which have optical ports. ffado-mixer currently does not work with any G3 models. *The protocol is pretty well understood; I'm hoping to find time soon to start adding this to ffado.*
*I wish I could help them, but my know-how is obviously limited within these scopes, I just hope "adding to FFADO" will arrive soon, till then I'll manage with H4.*
*The official status for all mk3 is still:* **MOTUMOTU "mark 3" devices http://www.ffado.org/?q=node/1268Planned On Fri, Sep 17, 2010 at 4:23 PM, Bernardo Barros bernardobarros2@gmail.comwrote:
some people reported good results with FFADO + MOTU on Linux. Check the latest version and report back to us :-)
2010/9/17 Pedro Lopes pedro.lopes@ist.utl.pt:
this sh*tty recorder =P http://www.samsontech.com/products/productpage.cfm?prodid=1901 Works as soundcard, nice (low) latency. I wish I could use my Motu on Linux... wish. Bad choice for open source, MOTU is hostile.
On Fri, Sep 17, 2010 at 4:08 PM, Ed Kelly morph_2016@yahoo.co.uk
wrote:
H4? By whom?
Metastudio 4 for Pure Data - coming soon!!
From: Pedro Lopes pedro.lopes@ist.utl.pt To: Ed Kelly morph_2016@yahoo.co.uk Cc: PD List pd-list@iem.at Sent: Fri, 17 September, 2010 16:03:36 Subject: Re: [PD] Latency
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio
buffer
size and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency
tutorial,
nice reading] I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk
wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no
ieee1394
(firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
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
-- 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
Trying to change my own subject thread...
But this computer is great with Linux, but is the MOTU good on USB?
I'm still searching for an answer other than "good USB audio is still a dream on Linux" as I have read on some other threads/forums Metastudio 4 for Pure Data - coming soon!!
From: Pedro Lopes pedro.lopes@ist.utl.pt To: Bernardo Barros bernardobarros2@gmail.com Cc: Ed Kelly morph_2016@yahoo.co.uk; PD List pd-list@iem.at Sent: Fri, 17 September, 2010 16:28:15 Subject: Re: [PD] Latency
some people reported good results with FFADO + MOTU on Linux.Not my MOTU :) I've tried FFADO but thanks for the reminder anyway. The previous "firmware" MOTUS definitely work on Linux, not Ultralike Mk3 still. The latest report (very recent) is [1]
[1] Update, 2 September 2010: audio streaming has been demonstrated on some of these G3 interfaces over the past few months, which means jackd can be used to get audio into and out of these interfaces under certain conditions (when testing this please make sure you're using the most recent svn snapshot available - r1882 or later). There is a report that the Ultralite Mk3 and the Ultralite hybrid (in firewire mode) are mostly working. The 828 Mk3 streams audio for most combinations of optical port mode settings (although some are yet to be tested). The Traveler Mk3 streams audio at all sample rates so long as the optical ports are turned off. Work is continuing on making the optical port support better on the G3 devices which have optical ports. ffado-mixer currently does not work with any G3 models. The protocol is pretty well understood; I'm hoping to find time soon to start adding this to ffado.
I wish I could help them, but my know-how is obviously limited within these scopes, I just hope "adding to FFADO" will arrive soon, till then I'll manage with H4.
The official status for all mk3 is still: MOTUMOTU "mark 3" devicesPlanned
On Fri, Sep 17, 2010 at 4:23 PM, Bernardo Barros bernardobarros2@gmail.com wrote:
some people reported good results with FFADO + MOTU on Linux.
Check the latest version and report back to us :-)
2010/9/17 Pedro Lopes pedro.lopes@ist.utl.pt:
this sh*tty recorder =P http://www.samsontech.com/products/productpage.cfm?prodid=1901 Works as soundcard, nice (low) latency. I wish I could use my Motu on Linux... wish. Bad choice for open source, MOTU is hostile.
On Fri, Sep 17, 2010 at 4:08 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
H4? By whom?
Metastudio 4 for Pure Data - coming soon!!
From: Pedro Lopes pedro.lopes@ist.utl.pt To: Ed Kelly morph_2016@yahoo.co.uk Cc: PD List pd-list@iem.at Sent: Fri, 17 September, 2010 16:03:36 Subject: Re: [PD] Latency
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio buffer
size and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency tutorial, nice reading] I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no ieee1394 (firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
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
-- 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
My MOTU is not USB. I have firewire (only) version of Ultralite, the hybrid USB/firewire is recent, very recent.
Additionally, MOTU complicates mapping of features, code of multitrack driver, and so forth - better understanding is at FFADO - I'm no expert/nor-even-amateur at this. It is not trivial USB audio driver, its THEIR driver. Once you get a MOTU you have to use their driver for YOUR system, and their's no Linux drivers, they don't give a damn (see official MOTU responses and foruns). Thus, I will never buy MOTU again because thy maintain a hostile policy against Linux/open source :) <- personal choice.
H2 is cool. Just like h4, except If i'm not mistaken it actually is a 4 track recorder (soundcard) while h4 is bogus 4 track, only 2 channels at a time.... haha.
My H4 was really cheap, so I don't regret it.
best regards, Pedro
On Fri, Sep 17, 2010 at 4:51 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
Trying to change my own subject thread...
But this computer is great with Linux, but is the MOTU good on USB?
I'm still searching for an answer other than "good USB audio is still a dream on Linux" as I have read on some other threads/forums
Metastudio 4 for Pure Data - coming soon!!
*From:* Pedro Lopes pedro.lopes@ist.utl.pt *To:* Bernardo Barros bernardobarros2@gmail.com *Cc:* Ed Kelly morph_2016@yahoo.co.uk; PD List pd-list@iem.at *Sent:* Fri, 17 September, 2010 16:28:15 *Subject:* Re: [PD] Latency
some people reported good results with FFADO + MOTU on Linux.
Not my MOTU :) I've tried FFADO but thanks for the reminder anyway. The previous "firmware" MOTUS definitely work on Linux, not Ultralike Mk3 still. The latest report (very recent) is [1]
[1] Update, 2 September 2010: audio streaming has been demonstrated on some of these G3 interfaces over the past few months, which means jackd can be used to get audio into and out of these interfaces under certain conditions (when testing this please make sure you're using the most recent svn snapshot available - r1882 or later). There is a report that the Ultralite Mk3 and the Ultralite hybrid (in firewire mode) are mostly working. The 828 Mk3 streams audio for most combinations of optical port mode settings (although some are yet to be tested). The Traveler Mk3 streams audio at all sample rates so long as the optical ports are turned off. Work is continuing on making the optical port support better on the G3 devices which have optical ports. ffado-mixer currently does not work with any G3 models. *The protocol is pretty well understood; I'm hoping to find time soon to start adding this to ffado.*
*I wish I could help them, but my know-how is obviously limited within these scopes, I just hope "adding to FFADO" will arrive soon, till then I'll manage with H4.*
*The official status for all mk3 is still:* **MOTUMOTU "mark 3" devices http://www.ffado.org/?q=node/1268Planned On Fri, Sep 17, 2010 at 4:23 PM, Bernardo Barros < bernardobarros2@gmail.com> wrote:
some people reported good results with FFADO + MOTU on Linux. Check the latest version and report back to us :-)
2010/9/17 Pedro Lopes pedro.lopes@ist.utl.pt:
this sh*tty recorder =P http://www.samsontech.com/products/productpage.cfm?prodid=1901 Works as soundcard, nice (low) latency. I wish I could use my Motu on Linux... wish. Bad choice for open source, MOTU is hostile.
On Fri, Sep 17, 2010 at 4:08 PM, Ed Kelly morph_2016@yahoo.co.uk
wrote:
H4? By whom?
Metastudio 4 for Pure Data - coming soon!!
From: Pedro Lopes pedro.lopes@ist.utl.pt To: Ed Kelly morph_2016@yahoo.co.uk Cc: PD List pd-list@iem.at Sent: Fri, 17 September, 2010 16:03:36 Subject: Re: [PD] Latency
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio
buffer
size and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency
tutorial,
nice reading] I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk
wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no
ieee1394
(firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
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
-- 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
-- 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
On Sep 17, 2010, at 11:51 AM, Ed Kelly wrote:
I'm still searching for an answer other than "good USB audio is still a dream on Linux" as I have read on some other threads/forums
It is not a dream, it depends on the hardware and its standards compliance. Roland/Edirol stuff is great. I have a UA-25 usb external that I have not had any trouble with and I've read the FA-66 firewire version works with the new firewire drivers. The problem is related to proprietary this and that in the drivers of some manufacturers. You can't expect decent drivers in Linux unless they are willing to give out the details and MOTU is apparently not.
Dan Wilcox danomatika.com robotcowboy.com
I totally agree with the ua25, I had an utterly flawless experience with it and Ubuntu Studio 10.04.
Matt
On 17 Sep 2010 18:56, "Dan Wilcox" danomatika@gmail.com wrote:
On Sep 17, 2010, at 11:51 AM, Ed Kelly wrote:
I'm still searching for an answer other than "good...
It is not a dream, it depends on the hardware and its standards compliance. Roland/Edirol stuff is great. I have a UA-25 usb external that I have not had any trouble with and I've read the FA-66 firewire version works with the new firewire drivers. The problem is related to proprietary this and that in the drivers of some manufacturers. You can't expect decent drivers in Linux unless they are willing to give out the details and MOTU is apparently not.
Dan Wilcox danomatika.com robotcowboy.com
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
I will sell my FA-101 and get a UA!
My best comp doesn't have firewire, so the FA-101 is a bit redundant. Thanks for letting me know this is the case, my knowledge is clearly out-of-date. Too busy making patches to notice what else is going on ;) Ed
Metastudio 4 for Pure Data - coming soon!!
From: Matte the.chaotician@gmail.com To: Dan Wilcox danomatika@gmail.com Cc: Ed Kelly morph_2016@yahoo.co.uk; PD List pd-list@iem.at Sent: Fri, 17 September, 2010 20:08:01 Subject: Re: [PD] Fw: Latency
I totally agree with the ua25, I had an utterly flawless experience with it and Ubuntu Studio 10.04. Matt On 17 Sep 2010 18:56, "Dan Wilcox" danomatika@gmail.com wrote:
On Sep 17, 2010, at 11:51 AM, Ed Kelly wrote:
I'm still searching for an answer other than "good...
It is not a dream, it depends on the hardware and its standards compliance. Roland/Edirol stuff is great. I have a UA-25 usb external that I have not had any trouble with and I've read the FA-66 firewire version works with the new firewire drivers. The problem is related to proprietary this and that in the drivers of some manufacturers. You can't expect decent drivers in Linux unless they are willing to give out the details and MOTU is apparently not.
Dan Wilcox danomatika.com robotcowboy.com
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
On Sep 17, 2010, at 5:39 PM, Ed Kelly wrote:
I will sell my FA-101 and get a UA!
... the UA-25 only has 2 ins and outs at 16bit, you can do 2 in at 24bit or 2 out at 24 bit, but not full duplex.
Too busy making patches to notice what else is going on ;)
Aw man, I want to be in that mode again.
Dan Wilcox danomatika.com robotcowboy.com
On 18/09/10 00:44, Dan Wilcox wrote:
On Sep 17, 2010, at 5:39 PM, Ed Kelly wrote:
I will sell my FA-101 and get a UA!
... the UA-25 only has 2 ins and outs at 16bit, you can do 2 in at 24bit or 2 out at 24 bit, but not full duplex.
I think it's slightly more complicated than that!
With my UA-25 I get full duplex at 24bit with the sample rate switch set to 44.1kHz and 48kHz (and the advance mode switch set to 'on', in case that matters). At 96kHz it is probably different, but I never tried that yet. (This is with the original UA-25, which I believe has been discontinued - the later versions may have different behaviour.)
From my qjackctl messages pane: --8<----8<-- apparent rate = 44100 creating alsa driver ... hw:1|hw:1|256|3|44100|2|2|nomon|swmeter|-|32bit control device hw:1 configuring for 44100Hz, period = 256 frames (5.8 ms), buffer = 3 periods ALSA: final selected sample format for capture: 24bit little-endian ALSA: use 3 periods for capture ALSA: final selected sample format for playback: 24bit little-endian ALSA: use 3 periods for playback --8<----8<--
Claude
Are you sure you really get 24 bit duplex? I don't think USB 1.1 has enough bandwidth. I was burned during a show at STEIM by accidentally switching the advanced switch on and the USB bus threw a kernel panic as soon as I hit a song with an [adc~]. Took me a while to figure that one out.
Sent from my phone.
Dan Wilcox robotcowboy.com danomatika.com
On Sep 18, 2010, at 2:59 PM, Claude Heiland-Allen claudiusmaximus@goto10.org wrote:
On 18/09/10 00:44, Dan Wilcox wrote:
On Sep 17, 2010, at 5:39 PM, Ed Kelly wrote:
I will sell my FA-101 and get a UA!
... the UA-25 only has 2 ins and outs at 16bit, you can do 2 in at 24bit or 2 out at 24 bit, but not full duplex.
I think it's slightly more complicated than that!
With my UA-25 I get full duplex at 24bit with the sample rate switch set to 44.1kHz and 48kHz (and the advance mode switch set to 'on', in case that matters). At 96kHz it is probably different, but I never tried that yet. (This is with the original UA-25, which I believe has been discontinued - the later versions may have different behaviour.)
From my qjackctl messages pane: --8<----8<-- apparent rate = 44100 creating alsa driver ... hw:1|hw:1|256|3|44100|2|2|nomon|swmeter|-|32bit control device hw:1 configuring for 44100Hz, period = 256 frames (5.8 ms), buffer = 3 periods ALSA: final selected sample format for capture: 24bit little-endian ALSA: use 3 periods for capture ALSA: final selected sample format for playback: 24bit little-endian ALSA: use 3 periods for playback --8<----8<--
Claude
On Sat, 18 Sep 2010, Dan Wilcox wrote:
Are you sure you really get 24 bit duplex?
take 12500000 bps, divide by 24, that's 520833 samples/second. divide by 88200 Hz, that's 5.9. You can transmit 5 channels, almost 6.
That's perhaps what you can do with USB 1.1, but I don't know more than that about it.
| Mathieu Bouchard ------------------------------ Villeray, Montréal, QC
On Sep 18, 2010, at 6:49 PM, Mathieu Bouchard wrote:
On Sat, 18 Sep 2010, Dan Wilcox wrote:
Are you sure you really get 24 bit duplex?
take 12500000 bps, divide by 24, that's 520833 samples/second. divide by 88200 Hz, that's 5.9. You can transmit 5 channels, almost 6.
That's perhaps what you can do with USB 1.1, but I don't know more than that about it.
So theoretically it should ... but I also have a usb-midi converter, keyboard, and 2 gamepads on the same bus. In my case at least, it seems 24 bit at full duplex is too much for the bus controller on my machine, while 16 bit full duplex is fine. At least thats my experience in practice with the UA-25, not the UA-25 EX or whatever the new model is called. I use it with Advanced Mode off.
Anyway, Ed I'd say check out the FA-66, see if you can borrow one to double check that the linux firewire drivers are working, whatever the name for the latest firewire audio drivers are.
Dan Wilcox danomatika.com robotcowboy.com
Anyway, Ed I'd say check out the FA-66, see if you can borrow one to double check that the linux firewire drivers are working, whatever the name for the latest firewire audio drivers are.
Well...herein lies my problem. The computer has no Firewire connection and no PCMCIA slot - so no FA. I have an FA101 (which nearly torched my set entirely in Sao Paulo with Ubuntu) but the computer I was using got stolen, and my newest and best comp has no Firewire, and so it's USB only for me!
Ironically, since I am now using Pure Dyne, the FA101 would probably work, since the whole system is optimized to run PD/SC/Audio
A friend of mine has the UA-101. I'll see if that works OK with Jack before I buy anything.
PS has anyone tried one of the Lexicon USB sound interfaces with PD rt linux?
e X
Well, I got the UA-101 cause I heard that the Edirols are perfectly supported (btw the FA-101 with FFADO is working flawlessly). However, it turned out that up to the previous alsa, it wasn't supported, and when it did in the latest alsa version, playback was corrupted (not recording!) due to some internal working of the card. The latest driver (separate module than snd-usb-audio module) fixed this issue and the card is working now, however at least for me it loses connection to the device randomly, after 1 min or 1 hour of operation. Not exactly ready for live performance...
akis
On 19 September 2010 15:27, Ed Kelly morph_2016@yahoo.co.uk wrote:
Anyway, Ed I'd say check out the FA-66, see if you can borrow one to
double check that the linux firewire drivers are working, whatever the name for the latest firewire audio drivers are.
Well...herein lies my problem. The computer has no Firewire connection and no PCMCIA slot - so no FA. I have an FA101 (which nearly torched my set entirely in Sao Paulo with Ubuntu) but the computer I was using got stolen, and my newest and best comp has no Firewire, and so it's USB only for me!
Ironically, since I am now using Pure Dyne, the FA101 would probably work, since the whole system is optimized to run PD/SC/Audio
A friend of mine has the UA-101. I'll see if that works OK with Jack before I buy anything.
PS has anyone tried one of the Lexicon USB sound interfaces with PD rt linux?
e X
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Ah! I have an H2, although I've never considered it anything other than a recorder (for the same sh*tty reason)
Ed
this sh*tty recorder =P
http://www.samsontech.com/products/productpage.cfm?prodid=1901
Works as soundcard, nice (low) latency. I wish I could use my Motu on Linux... wish. Bad choice for open source, MOTU is hostile.
On Fri, Sep 17, 2010 at 4:08 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
H4?
By whom?
Metastudio 4 for Pure Data - coming soon!!
From: Pedro Lopes pedro.lopes@ist.utl.pt
To: Ed Kelly morph_2016@yahoo.co.uk Cc: PD List pd-list@iem.at Sent: Fri, 17 September, 2010 16:03:36 Subject: Re: [PD] Latency
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio buffer size
and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency tutorial, nice reading]
I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no ieee1394 (firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
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
Hi, On Fri, Sep 17, 2010 at 03:54:25PM +0000, Ed Kelly wrote:
Ah! I have an H2, although I've never considered it anything other than a recorder (for the same sh*tty reason)
well, try it. All USB audio devices have the same (driver) latency, so any will do as far as latency is concerned.
Check this site for some more setup hints: http://alsa.opensrc.org/index.php/Usb-audio
Especially "options snd-usb-audio nrpacks=1" can be useful. USB audio on Linux can give you pretty nice latencies with a rt-kernel. Instead of Jack, it may also be good to try "-oss" or "-alsa". In my (a bit old) experience, -oss worked better than -jack.
Ciao
Frank
USB 1.0 they all have same driver. Not true for 2.0 and maybe this is not true for 3.0.
I wonder why this happens...
2010/9/17 Frank Barknecht fbar@footils.org:
Hi, On Fri, Sep 17, 2010 at 03:54:25PM +0000, Ed Kelly wrote:
Ah! I have an H2, although I've never considered it anything other than a recorder (for the same sh*tty reason)
well, try it. All USB audio devices have the same (driver) latency, so any will do as far as latency is concerned.
Check this site for some more setup hints: http://alsa.opensrc.org/index.php/Usb-audio
Especially "options snd-usb-audio nrpacks=1" can be useful. USB audio on Linux can give you pretty nice latencies with a rt-kernel. Instead of Jack, it may also be good to try "-oss" or "-alsa". In my (a bit old) experience, -oss worked better than -jack.
Ciao
Frank
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On Fri, Sep 17, 2010 at 02:37:39PM -0300, Bernardo Barros wrote:
USB 1.0 they all have same driver. Not true for 2.0 and maybe this is not true for 3.0.
Well, there is a standard for usb 2.0 audio devices AFAIK, but no device implements it, they all use their own proprietary stuff which makes Linux support diffictult, to say the least. For USB 1 the standard was widely adopted and works very well on Linux (some say better than on Windows).
Ciao
Frank Barknecht Do You RjDj.me? _ ______footils.org__
You can't expect decent drivers in Linux unless they are willing to >give
out the details and MOTU is apparently not. So true! That's why I do not wish to support MOTU any more. (great hardware anyway... terrible marketing choices to my perspective).
On Sat, Sep 18, 2010 at 1:18 PM, Frank Barknecht fbar@footils.org wrote:
On Fri, Sep 17, 2010 at 02:37:39PM -0300, Bernardo Barros wrote:
USB 1.0 they all have same driver. Not true for 2.0 and maybe this is not true for 3.0.
Well, there is a standard for usb 2.0 audio devices AFAIK, but no device implements it, they all use their own proprietary stuff which makes Linux support diffictult, to say the least. For USB 1 the standard was widely adopted and works very well on Linux (some say better than on Windows).
Ciao
Frank Barknecht Do You RjDj.me? _ ______footils.org__
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Get an real-time kernel if possible.
Tune your system:
check here for a test script: https://realtimeconfigquickscan.googlecode.com/hg/
When I need full power I use this script: (I think you have to install some package for this, I dont use ubuntu)
#!/bin/bash
/sbin/sysctl -w vm.swappiness=10 tuned-adm profile latency-performance
Also you have to create a 'audio' group, add yourself to this group and edit etc/security/limits like this: (it seems that ubuntu changed this path for some strange reason, you have to check it)
@audio soft cpu unlimited @audio - rtprio 100 @audio - memlock unlimited @audio - nice -20
2010/9/17 Pedro Lopes pedro.lopes@ist.utl.pt:
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio buffer
size and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency tutorial, nice reading] I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no ieee1394 (firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
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
hi all
does anybody know, how i can recognice the pid of the started pd out
of pd itself?
any help preciated
yours sincerely markus
-
Arxontis Politis -
Bernardo Barros -
brandt＠subnet.at -
Claude Heiland-Allen -
Dan Wilcox -
Ed Kelly -
Frank Barknecht -
Mathieu Bouchard -
Matte -
Pedro Lopes