Linux-audio-user January 2011

linux-audio-user@lists.linuxaudio.org

158 participants
141 discussions

[LAU] Building a low latency friendly kernel

by S. Massy

Hi, I was wondering whether there were any articles/pointers to building an audio friendly kernel, whether RT or stock. I'm looking for informations such as what might be options, or even features, which are hurtful to low-latency. Looking for low latency kernel info on google, btw, yields outdated information, by and large. Cheers, S.M.

14 years, 11 months

[LAU] Audacity book

by A. C. Censi

The Audacity of Carla Schroder In this exclusive Linux Pro Magazine interview, tell-it-like-it-is, Linux Today editor Carla Schroder talks about her latest book, The Book of Audacity, shares facts about herself you won’t find anywhere else, a peek into her current projects, and offers advice for women on making their own paths, encouraging children, and more. -- A. C. Censi accensi [em] gmail [ponto] com accensi [em] montreal [ponto] com [ponto] br

14 years, 11 months

[LAU] Rebuild Ardour 2.8.11-3.6.src.rpm on openSUSE 11.2 (64)

by Yosef Werner

Hi, I tried to rebuild Ardour 2.8.11-3.6 from src.rpm on openSUSE 11.2 64 bit. The building process exits with following lines: scons: done building targets. + /usr/lib/rpm/suse_update_desktop_file.sh --basedir /usr/src/packages/SRPMS ardour2 AudioVideo Recorder GTK WARNING: Category "Audio" is unknown \! WARNING: it is ignored, until you registered a Category at opensuse-packaging(a)opensuse.org . WARNING: Category "X-Recorders" is unknown \! WARNING: it is ignored, until you registered a Category at opensuse-packaging(a)opensuse.org . WARNING: Category "X-Multitrack" is unknown \! WARNING: it is ignored, until you registered a Category at opensuse-packaging(a)opensuse.org . WARNING: Category "X-Jack" is unknown \! WARNING: it is ignored, until you registered a Category at opensuse-packaging(a)opensuse.org . + mkdir -p /usr/src/packages/BUILDROOT/ardour-2.8.11-3.6.x86_64/usr/share/pixmaps + cp /usr/src/packages/BUILDROOT/ardour-2.8.11-3.6.x86_64/usr/share/ardour2/icons/ardour_icon_48px.png /usr/src/packages/BUILDROOT/ardour-2.8.11-3.6.x86_64/usr/share/pixmaps/ardour2.png + cd /usr/src/packages/BUILDROOT/ardour-2.8.11-3.6.x86_64/usr/share/locale /var/tmp/rpm-tmp.qzVQ4Y: line 36: cd: /usr/src/packages/BUILDROOT/ardour-2.8.11-3.6.x86_64/usr/share/locale: No such file or directory error: Bad exit status from /var/tmp/rpm-tmp.qzVQ4Y (%install) Does anybody have an idea what this means? Thanks for help. Yosef

14 years, 11 months

[LAU] Midi Sample Dump transmission

by Brent Busby

I'm aware that Audacity and probably any other program that has access to libsndfile functions can read and save Midi Sample Dump file format, but is there a program for Linux that can actually transmit them over Midi? Can you do it with the amidi command? -- + Brent A. Busby + "We've all heard that a million monkeys + UNIX Systems Admin + banging on a million typewriters will + University of Chicago + eventually reproduce the entire works of + Physical Sciences Div. + Shakespeare. Now, thanks to the Internet, + James Franck Institute + we know this is not true." -Robert Wilensky

14 years, 11 months

[LAU] what is happening on linuxmusicians.com

by Fabio

admin and mod seam to have abandoned the page? there is a spambot posting 10.000s of spams the whole day allready.

14 years, 11 months

[LAU] Qtractor 0.4.8, compile prob with libslv2 on Kubuntu Hardy

by Nigel Henry

This is Qtractor 0.4.8 with Rubberband and it's deps, and the 2 header files from Steinbergs vst-sdk-2.4. Installed on Kubuntu Hardy (8.04). Lv2core version 2.0-0-ematech1 Rubberband version 1.5.0 vamp-plugin-sdk-1.3 It compiled ok before I added libslv2, and libslv2-dev (version 0.6.0 from ematech repo), and told me that LV2 plugin capability was disabled. With libslv2 installed the compiler grinds to a halt. Relevant bit below. Any idea what the problem is. Libslv2 too old perhaps? I couldnt install libslv2-9 which is for Kubuntu Intrepid, as it results in a dependancy hell when trying to install its -dev package. -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtXml -I/usr/include/qt4/QtXml -I/usr/include/qt4 -I. -I/usr/include/qt4 -I/usr/local/include -I/usr/include -I/usr/include/qt4 -Ivestige -Ilv2 -I.moc -I.ui -o .obj/qtractorLv2Plugin.o qtractorLv2Plugin.cpp qtractorLv2Plugin.cpp:211: warning: unused parameter ‘pGtkWindow’ qtractorLv2Plugin.cpp: In member function ‘virtual void qtractorLv2Plugin::openEditor(QWidget*)’: qtractorLv2Plugin.cpp:1026: error: ‘gtk_widget_get_window’ was not declared in this scope make[2]: *** [.obj/qtractorLv2Plugin.o] Error 1 make[2]: Leaving directory `/home/djmons/Downloads/Qtractor/qtractor-0.4.8/src' make[1]: *** [sub-src-make_default] Error 2 make[1]: Leaving directory `/home/djmons/Downloads/Qtractor/qtractor-0.4.8' make: *** [src/qtractor] Error 2 djmons@djmons-desktop:~/Downloads/Qtractor/qtractor-0.4.8$ Thanks for any suggestions. Nigel.

14 years, 11 months

Re: [LAU] [LAA] Foo YC-20 1.2.0 released

by Jeremy Jongepier

On 01/20/2011 04:03 PM, Sampo Savolainen wrote: > Hi, > > I am proud to introduce a new version of Foo YC-20, the Yamaha YC-20 > software synthesizer. > > The main udpates in version 1.2.0 are: > - LV2 plugin > - VSTi plugin (and standalone Jack client) for Windows > - OS X build (standalone Jack client) > - Improved volume control curve > - Fixed bug with 4' drawbar bleed > - More subtle hover highlights > - Switch GUI to use GTK directly without GTKmm > > It is worth noting that the plugins allow finer control of the drawbar > positions than the standalone GUI offers. > > Big thanks to Robin Gareus for the work on the OS X build! > > > Source tarball: http://foo-yc20.googlecode.com/files/foo-yc20-1.2.0.tar.bz2 > > Windows (VSTi and Jack client): > http://foo-yc20.googlecode.com/files/foo-yc20-1.2.0.zip > OS X (Jack client): http://foo-yc20.googlecode.com/files/foo-yc20-1.2.0.dmg > > Website: http://code.google.com/p/foo-yc20/ > Screenshot: http://foo-yc20.googlecode.com/svn/trunk/graphics/screenshot.png > > --- > > The YC-20 is a divide-down combo organ designed in the late 60's. This > emulation faithfully copies the sound, features and flaws of the > original organ. > > Main features of this synthesizer: > * 61 keys > * Two main voice sections > * Switchable bass section > * No polyphony restrictions > * A realism control to add flaws found in the real organ > > Flaws: > * Takes quite a bit of CPU power > * No touch vibrato > > The emulation is written in Faust and uses Jack for audio and MIDI. > All controls of the synthesizer can be controlled with MIDI. > > There is an undocumented "easter egg". Any command line argument given > to the program will be used as the configuration file name. The state > of the organ controls are read from the file and the file will be > overwritten with the current setup when the synthesizer is shut down. > > More information about the real organ can be found at: > http://www.combo-organ.com/Yamaha/yamaha.htm#YC-20 > > > Sampo Savolainen Hello Sampo, Thanks for this, great stuff! The LV2 plug-in is a very welcome addition also, works like a charm! Quite heavy on CPU load though ;) I've uploaded the new version to my PPA for Ubuntu Lucid: https://launchpad.net/~autostatic/+archive/ppa Best, Jeremy

14 years, 11 months

[LAU] [ANN] tschack-0.120.1 and PyJackd-0.1.0

by torbenh

hi... since jack1 release is taking pretty long, i decided to stop waiting with a tschack release. tschack is an SMP aware fork of jack1. its a dropin replacement like jack2. features: - jack1 mlocking - controlapi which works even when libjackserver.so is loaded RTLD_LOCAL - smp aware - backendswitching - strictly synchronous like jack1. (-> no latency penalty) - clickless connections. - shuts down audio processing when cpu is overloaded for too long. i also released PyJackd which is a wrapper around libjackserver. features: - commandline for backendswitching - pulseaudio dbus reservation. get it here: http://hochstrom.endofinternet.org/files/tschack-0.120.1.tar.gz http://hochstrom.endofinternet.org/files/PyJackd-0.1.0.tar.gz -- torben Hohn

14 years, 11 months

[LAU] Firewire linuxaudio laptops, recomendations?

by dmotd

These threads can add clutter to the list so i appologise in advance.. I have come to the end of another laptop lifespan, and have started searching for a replacement. Unfortunately the marketplace has substantially changed since my last search and in this period it seems that both firewire (400+800) and pc expansion ports have been for the most part eradicated. As an owner and constant user of a half decent firewire interface (fa-101), and with a rather constrained budget, i would hate to have to ditch it. So what are the options these days? I use a laptop for live performance, so a desktop is out of the question. And as much as the hardware is solid and generally well spec'd, i'd prefer to avoid the expensive premium for glowing fruit. For all the bells and whistles of modern hardware it seems that few machines are designed with pro audio in mind, and even those left with 1394 support often use dud chipsets like ricoh. Combined with infuriating graphics card support (yes i need DRI - blender/pd-gem) I am finding this round of laptop compatability just a little more frustrating than usual. So what can folks recommend for linux multimedia, which companies are comitted to packaging decent quality chips with solid assembly? Or contrary, what are the recent horror stories - what looked good on paper, only to fail miserably under a stress test? I know that these things keep changing and keeping abreast is some folks full-time job, but really should it be so difficult!? My last machine was an old hp/compaq nc6400 with a belkin fw (TI based) pcmcia (TI cardbus). Sadly missed. Thanks for your thoughts, any advice is much appreciated. Cheers, dmotd FWIW.. The best i've found online is this blog entry with a basic comparrison - not linux based but i'm sure the observations mostly stick: http://www.pc-music.com/content/lifting-lid-audio-laptops-part-2

14 years, 11 months

[LAU] ubuntu studio 64 vs. plain ubuntu 64 with ubuntu studio packages

by Robin Paulson

is there any difference between these two methods of arriving at ubuntu studio? i ask, because the ubuntu studio installer is broken - maybe for me, maybe for all. it reports "no kernel to install" part way through the installation process. i'm not sure if this is my system (very new phenom X6), or a wider bug does the full ubuntu studio install, for instance set up access to real-time audio any differently? cheers -- robin http://tangleball.org.nz/ - Auckland's Creative Space http://bumblepuppy.org/blog/

14 years, 11 months

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Linux-audio-user January 2011