Linux-audio-user August 2007

linux-audio-user@lists.linuxaudio.org

156 participants
148 discussions

by Stéphane Letz

> > Message: 5 > Date: Mon, 20 Aug 2007 20:37:08 +0200 > From: Fons Adriaensen <fons(a)kokkinizita.net> > Subject: Re: [LAU] Re: Jackmp - libjackdmp.so > To: linux-audio-user(a)lists.linuxaudio.org > Message-ID: <20070820183708.GA6201(a)linux-2.site> > Content-Type: text/plain; charset=iso-8859-1 > > On Mon, Aug 20, 2007 at 05:38:34PM +0200, Stéphane Letz wrote: > >> Any program that correctly does dynamic linking should work with >> ackdmp. I remember some (?? don't remember which right now )-:) that >> were doing static linking with a specific version of libjack.so thus >> failing to work with jackdmp. > > I have a weird problem with alsaplayer. > > I start jackdmp on hw:1. Everything works fine, except alsaplayer. > When started it plays to both hw:0 and hw:1, at twice the normal > speed but normal pitch. Now I guess it was linked statically > with libjack (Grrrr), but why/how it manages to use both servers > at the same time I just can't imagine... Hum, how can that happens?? Do you really have jackd and jackdmp running at the same time?? > > The autotools files just are beyond my comprehension. Does anyone > know the trick to make alsaplayer use the dynamic libjack (and only > that) ? > > jackdmp 0.63 > alsaplayer 0.99.80-rc2 > Recompile it with jackdmp installed? ((-: Stephane

18 years

[ANN] Qsynth 0.3.0 (unstable-qt4) has been released!

by Rui Nuno Capela

Hi everyone, Qsynth 0.3.0 is now out for you to try and guess what? This marks the point of no return to the aging Qt3 framework. Yes, Qt4 migration was complete. Hints from the change-log might be shallow, but nevertheless: - Qt4 migration has comenced and is now complete. Care must be taken with this new configuration file and location: this release starts a new one from scratch and won't reuse any of the previous existing ones, although cut and paste might help if you know what you'll be doing :) - Application icon is now installed to ${prefix}/share/pixmaps; application desktop entry file is now included in installation; spec file (RPM) is now a bit more openSUSE compliant; initial debianization. - Default font option names were adjusted to "Sans Serif" and "Monospace", wherever available. - The "keep child windows always on top" option is not set as default anymore, because window focus behavior gets tricky on some desktop environments (eg. Mac OS X, Gnome). - Autoconf (configure) scripting gets an update. Good grief. All this is rteadily available from the usual place: http://qsynth.sourceforge.net http://sourceforge.net/projects/qsynth Cheers && Enjoy & -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

18 years

Maximum channel limit on jack clients 32 ?

by Winfried Ritsch

Hello, Maybe I just not a master googler, but I didnt find any answer why qjackctl limits maximum of input or output channels to 32. Also PD has this limit compiled in and so on, but jackd starts with 64 channels with my MADI-card ? Is there a technical reason or can I just remove the limits in the code ? Its not so bad becaused I always used alsa-only before, but I just want give jack a try. BTW, I also would suggest that if a limit is needed, it should be 256 channels (4 MADI-Cards) I thinks its the maximum you can do nowaday with linux, but if there is the rule of computer speed, so I can think, this count will double each 2 years, so to be save for next 4 years we need 1024 channels limit. mfg winfried -- -- - Winfried Ritsch - ritsch(a)iem.at - http://iem.at/ritsch - Institut fuer Elektronische Musik und Akustik - University of Music and Dramatic Art Graz - Tel. ++43-316-389-3510 (3170) Fax ++43-316-389-3171 - PGP-ID 69617A69 (see keyserver http://wwwkeys.at.gpg.net/) --

18 years

Re: [Ardour-Users] smp questions etc

by Sampo Savolainen

Quoting Matthew Polashek <matt(a)tinysongs.com>: > Ok, I'm throwing together a new box in which I will install > UbuntuStudio with the intention of using it as a live processing rig > for live performance using PD. I'm interested in discovering whether > it makes more sense to get a Core 2 Quad processor that runs with a > bus speed of 1066 or a Core 2 Duo processor that runs with a bus > speed of 1333. The idea is to reduce latency as much as possible. > I'll get I/O via a RME 9652 and a couple Behringer ADA8000 units. > Also, any thoughts on how ram speed plays into this equation? I'm > looking at the Intel dg33fb board. Ardour is multi-threaded, but at the moment, Ardours' audio processing is run in a single thread. This means that the audio work done by jack cannot be spanned over two processors. Using jackdmp will enable your system to run some jack clients in parallel (depending on the connection scheme between them). But this only means that different jack clients will be able to run in parallel. It doesn't make Ardour process in multiple threads. This is something we will work on in the future, but at the moment, this makes the choice quite clear: core 2 duo should suffice well. A quad core will be more future proof though. I can't really comment on bus speed or ram speed. Like always, the faster the better, but the question is how much of a difference it will make? My guess is that while it would be faster, it probably is not that much faster that you could run with half the buffer size than with the slower bus/ram. Before you get really dissappointed by this fact, remember that while only one cpu can be used for ardour work, it means thath the second core (or rest of them in the case of the quad) is free to run all those other tasks in your system. This means that the ardour gui, the desktop and other applications will be practically unaffected by the DSP load on your box. This is a big boon on 2 cpu systems. Sampo

18 years

Re: smp questions etc

by Asmo Koskinen

Matthew Polashek kirjoitti: > I'm looking at the Intel dg33fb board. > I have Intel DQ965GF, irqbalance helped me: https://lists.ubuntu.com/archives/ubuntu-studio-users/2007-July/000377.html Best regards Asmo Koskinen.

18 years

Stream Box setup questions

by Matt Rockwell

Greetings: I am seeking assistance with a couple of issues relating to my Ubuntu server stream box. 1. I am currently running darkice to create a stream from a Delta1010 interface. Is there a way to create additional streams from additional inputs? I have everything configured with ALSA for the first stereo input pair, but I cannot figure out how to create another stream from the second stereo pair. 2. I would like to configure a box with as little config as possible to connect to a stream on boot and pass the audio to the audio port. I cannot find a command line util to do this, and I am not sure how to configure something like this to automatically connect on boot. My goal is to build a temporary (one year) backup Studio to Transmitter link for our station. We currently have a wireless lan connection to campus because we are located off campus. This existing configuration bottlenecks at about 20 listeners with our Icecast2 server on the studio end of the network. New construction has blocked our microwave path and reduced us to a POTS codec to feed our FM transmitter. We are about to move our microwave transmitter to a different building on-campus and deliver the audio over the IP connection. At the same time, I would like to move our Icecast2 relay box to the new on-campus location to get the connecting traffic off of the wireless link. If I can, I would like to send a higher bandwidth stream for the microwave in addition standard "low" and "high" .mp3 streams. Right now, if I add the higher bandwidth stream to the current darkice config, all streams start to skip. While I can drive everything off of one pair of analog inputs on the Delta1010, I would like to use two seperate stereo pair so that Emergency Alerts are not on the webstream feed. Any suggested configurations would be most helpful. Thanks all. MattRock -- Matt Rockwell- Technical Director University of Wisconsin- WSUM Student Radio http://wsum.net/

18 years

Re: Jackmp - libjackdmp.so

by Stéphane Letz

> > Message: 1 > Date: Mon, 20 Aug 2007 15:54:18 +0200 > From: Lars Luthman <lars.luthman(a)gmail.com> > Subject: Re: [LAU] Re: Jackmp - libjackdmp.so > To: linux-audio-user(a)lists.linuxaudio.org > Message-ID: <1187618058.4917.1.camel(a)box.lars> > Content-Type: text/plain; charset="utf-8" > > On Mon, 2007-08-20 at 15:24 +0200, Stéphane Letz wrote: >> Le 20 août 07 à 15:11, Asmo Koskinen a écrit : >> >>> Stéphane Letz kirjoitti: >>>> The best is always to get the latest published version (0.63 for >>>> now). >>>> >>>> >>> >>> OK, it seems that I have try this version: >>> >>> asmok@ubuntu:~$ /usr/local/bin/jackdmp >>> jackdmp 0.64 >> >> This is the SVN version. Better use the published 0.63 version >> (http://www.grame.fr/~letz/jackdmp_0.63.zip) >> >>> >>> How about other programs? Do you know what programs can use jackdmp >>> instead of jackd? Is there any available? >>> >>> Bets regards Asmo Koskinen. >> >> Any program that correctly does dynamic linking should work with >> jackdmp. I remember some (?? don't remember which right now )-:) that >> were doing static linking with a specific version of libjack.so thus >> failing to work with jackdmp. > > Aren't there some differences with the threads in which certain > callbacks are executed, Yes, they are 2 threads, one for audio callback (Real-Time) and one for non RT code, that is notifications from the server. But in general this is completely transparent for applications, and I don't know of any applications that show problems because of that (if they are some, please tell me... ((:) > and with MIDI? > Dmitry Baikov was working on that, and part of the code for MIDI in already in jackdmp MIDI branch, although it is not complete yet. Stephane

18 years

New interest in Linux for DAWs

by Folderol

kara-moon have just opened a new topic on their site called 'The open source alternative'. They are very keen to hear about peoples experiences with regard to setting up a Linux based studio. One guy in particular wants to build a complete system from scratch, and has the luxury of plenty of time. However, I get the impression they are mostly interested in a fairly easy to set up system, some advice and warnings, and maybe a bit of simple encouragement. http://www.kara-moon.com/forum/index.php?topic=892.0 -- Will J Godfrey http://www.musically.me.uk

18 years

Re: [LAU] which apps to choose for the job and how to set things up?

by Dominic Arsenault

Thanks a lot, Julien, for your "tutorial". I have successfully set things up and managed to get sound and all! Only problem is I have too much lag. I think I would have to install the realtime kernel, and try my USB Audiophile soundcard. I'm pretty worn out from these weeks of struggling though. Yesterday I launched my Windows laptop and within two hours had completed the MIDI to VST output process. That was so nice. I think I'll stick with it and record the VSTI-ed output in wav files, then send them over to my Linux pc for the audio recording and editing (which works very well without problems). If I ever get a problem with my laptop I'll try my hand in returning to a Linux VSTI set-up, but for now I'm exhausted, and I'd rather cross the river if my current bridge ever fails. I hope the next Ardour release will give an easier time to aspiring Linux musicians with specific needs (I realize I was asking for something pretty specific. "standard" audio and MIDI isn't that hard to get). Thankfully, the user community is very supportive! :) Cheers, Dominic On 8/20/07, Chuckk Hubbard <badmuthahubbard(a)gmail.com> wrote: > > On 8/19/07, Julien Claassen <julien(a)c-lab.de> wrote: > > > > Hi! > > I think you might try ardour. I know it can host and record > > VST-generated > > sounds. At least I believe so. Anyone can confrim? > > With your setup, it seems to me you might want to kick timidity++ out > > of > > your chain. Timidity plays sounds using its own sounds (GUS-patches or > > soundfonts), if not for me it had a great latency. I don't know exactly > > about > > freeST, but it might have it's own midi port. So in an xterm or on the > > console > > you may try: > > aconnect -li > > and > > aconnect -lo > > This will display all alsasequencer midi-ports currently in existence. > > You > > can also use some graphical patchbay to do the same. I think ghostess is > > a > > nice one, just search for "patchbay", you should get a list of them. > > Then connect your rosegarden midi-out (if it has one) to your freeVST > > in (if > > that has one) and connect your FreeVST jack_output to audacity. So take > > the > > > I'm also fond of the aconnect solution. You aren't reliant on how the > sequencer's developers decided to set things up. Is there any loss of > timing, anyone? Although right now, Csound's ALSA midi output isn't working > for me. > I haven't been able to get Rosegarden to load Csound's csLADSPA, perhaps > it doesn't use LADSPA_PATH to search for plugins. It has its own plugin > directory. I know Rosegarden is pretty and a bit more developed, but Muse > seems to be more useful sometimes. Of course neither one has an interface > like some of the commercial programs- yet- but I think it'll happen, > gradually. > > I haven't used Ardour much, I understand it's pretty cool, but you could > totally use Audacity for both steps 2 and 3. > ALTHOUGH, I read that someone was commissioned to add MIDI sequencing to > Ardour! So maybe in another few months, Ardour could be the only program > necessary for the whole process! Future Linux composers will look back and > say "How did they manage like that?" > > -Chuckk >

18 years

alsa problem

by arisstotle.54695488＠bloglines.com

This has to be one of those problems with an overly simple solution, but it escapes me atm. I first noticed it with xmms, playing music, of any sort, it will play fine for a while, then will stop, as if waiting to fill up a buffer, but never starts back again, it also continues to display the play symbol but no time advancement. I've narrowed it down to being an alsa problem, because when I run aplay somesound.wav, aplay never exits, and the sound loops indefinitely.

18 years

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Linux-audio-user August 2007