Linux-audio-user August 2010

linux-audio-user@lists.linuxaudio.org

118 participants
112 discussions

Steinway_IMIS2.2 soundfont (no loops fix)

by Roberto Gordo Saez

This is Steinway_IMIS soundfont, version 2.2. ftp://musix.ourproject.org/pub/musix/sf2/Steinway_IMIS2.2 This version fixes the issue with loops. I hope this is the good one and there are no more remaining major bugs. Marcos is a little busy right now, so he asked me to make this fix. He is thinking to make other improvements, so expect more updates soon.

1 year, 5 months

[linux-audio-user] Sub-harmonic generator? (LADSPA or VST)

by Tim Howard

Hello, Does anyone know of a good plugin that will generate subharmonics? I would like to put a little more low frequency "oomph" into my bass track. Preferrable LADSPA, but VST would work, too. Thanks for any help! -TimH

8 years

Re: [LAU] Simple, easy multithreaded circular buffer library for Linux?

by Kjetil S. Matheussen

Olivier Guilyardi: > > Ken Restivo wrote: >> It has been over 7 years since I last messed around with writing Pthreads applications. >> >> I recall it as a painful, ugly, brain-numbing task. I located an exercise I did back then to address the consumer/producer problem in Pthreads, and just the sight of it is giving me a headache. >> >> I'm being lazy, so instead of researching everything that's out there, I'll ask here: can anyone recommend a relatively simple and painless abstraction library (GPL or LGPL of course) that will give me functions to create a thread in which I can stuff things into a ring buffer, and another thread in which I can pull stuff out of it? >> >> By the way, I know that JACK has a very nice event buffer which is insanely easy to use (and I have), and makes multithreading almost transparent, but this isn't a JACK app. > > I don't know of any abstraction library, but creating/terminating a normal > thread with pthread is really an easy task IMO. It's about 10 lines in C. > > For inter-thread communication there's Portaudio's ring buffer: > http://portaudio.com/trac/browser/portaudio/trunk/src/common/pa_ringbuffer.h > > It can easily be used out of Portaudio (I'm currently doing that), and it > features memory barriers [1] which AFAIK Jack's ringbuffer doesn't. > > One problem with everything Portaudio is this heavy naming scheme. For a simpler > API, you might like my little wrapper: > http://jackbeat.samalyse.org/browser/jackbeat/trunk/src/core/ringbuffer.h > Nice. It's probably quicker to copy the jack_ringbuffer.c file out of jack though. > Portaudio actually also offers a callback mechanism (with hidden thread > creation), so if you're coding an non-JACK audio app, you might want to check it > out. > > For thread synchronization, semaphores (man semaphore.h) are really easy to use. > However, if you need a lock-free equivalent (for realtime, ...) phtread mutex > and especially pthread_mutex_trylock are your friends. > Those friends can be really cranky sometimes though. By using atomic operations instead, it's possible to avoid a lot of headache by not having to synchronize at all. Performance might be better too. Midishare has lockfree atomic functions for lifo and fifi queues: http://midishare.cvs.sourceforge.net/viewvc/midishare/midishare/src/common/…

12 years, 7 months

Le Puzzle du Batteur - The Drummer's 'G'igsaw: GNU Bash + GNU sed replace gvim

by Phil Hézaine

Le Puzzle du Batteur - The Drummer's 'G'igsaw ***** Polymetric editor for Drums and Percussions based on Lilypond + GUI for randomization. (midi timing and/or volume) ****** PACKAGES You have to install: GNU Lilypond >= 2.12.0 http://lilypond.org/web/install/ midicomp 0.0.4 http://midicomp.opensrc.org/midicomp-0.0.4.tar.gz (compile in /usr/local/midicomp... and move midicomp.bin in /usr/local/bin Python 2.6.x with Tk option activated. Already in your Linux distribution. GNU Bash and GNU sed 4.2 by default in your Linux distribution. As default midi config I use Timidity++ 2.13.2 with eawpatches. ****** INSTALLATION Untar the archive. (tar jxvf ....) In your terminal go to your Drummer-s-Gigsaw's repertory. cd /home/....../Drummer-s-Gigsaw and run the bash script: sh INSTALL.sh You are done. ****** * In this new version you no longer need to gvim. Thus you can use your preferred text editor or even a dedicated editor like Frescobaldi or Lilypondtool... * Now you can write all notes values, from whole note (1) up to * one-hundred-and-twenty-eighth note (128) and even dotted values. * The manual is updated. (translated in my terrible English) * Le Puzzle du Batteur/The Drummer's 'G'igsaw is under GPLv3 or + ****** This new version at: http://philippe.hezaine.free.fr/spip.php?article46 Have fun. Phil.

13 years, 1 month

jackd in realtime as user: a no-go in spite of modifying limits.conf

by Der Mickster

Hey, Can't seem to start jackd in realtime as user on ubuntu studio. It does start as root, but that's hardly a consolation (unless I run all audio software as root, which would be kinda daft IMO) @audio - rtprio 99 @audio - nice -10 @audio - memlock unlimited have been added to /etc/security/limits.conf Nevertheless, starting it as user just doesn't seem to work, and I just can't figure out why. I've googled the issue, and everybody seems to agree that modifying limits.conf in the above manner should solve the problem - yet this is what I get: mick@kaizoku:~$ jackd -R -P89 -dalsa -dhw:0 -r48000 -p256 -n3 -S & [1] 3092 mick@kaizoku:~$ no message buffer overruns jackd 0.116.1 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. cannot use real-time scheduling (FIFO at priority 10) [for thread -1217255744, from thread -1217255744] (1: Operation not permitted) cannot create engine Any ideas? Mick.

13 years, 9 months

re Subconscious Affecting Music

by david

I asked a friend of mine, who's rather intellectual about music, about the book someone mentioned in this thread, of ancient Greek thought on the effect of music on the mind: > I have heard of it, and read about it, but that isn't the work one > would cite if you were looking for a scientific study of the effects > of music on the subconscious mind. > > I am not familiar with the literature, but I am aware that there has > been a lot of nonsense written on the subject. -- David gnome(a)hawaii.rr.com authenticity, honesty, community

13 years, 11 months

(Done in Linux) this is jazz

by James Morris

http://jwm-art.net/art/audio/this_is_jazz.ogg recorded live in my imaginary smoke-filled basement in the wee early hours ;-)

13 years, 12 months

Installing Google Voice Chat for Linux on Fedora instead of Debian

by Niels Mayer

Excited to see http://googleblog.blogspot.com/2010/08/call-phones-from-gmail.html , I was quickly disappointed to find the plugin only supported debian and was 32 bit. However, I persevered and got it running on Fedora 12 x86_64 anyways. Solution: http://www.google.com/support/forum/p/chat/thread?tid=10ffe01c3a4779f5&hl=e… Google ought to hire someone that knows about App Development and Linux Audio and Fedora packaging (me?) to make the audio/video experience nicer for it's Linux users. In particular, not just blindly using ALSA devices for input that cannot possibly support audio capture, although I guess I'm a fringe-case since I don't use pulseaudio, since I've got KDE's phonon setup to do the right thing w/r/t all my audio devices, including the ones talking via Jackd. ( http://ccrma-mail.stanford.edu/pipermail/planetccrma/2010-May/016886.html ). Also, not assuming every Linux user runs a debian/ubuntu distro would be helpful as well :-) ---------- Forwarded message ---------- From: Google Help <noreply(a)google.com> Date: Wed, Aug 25, 2010 at 5:13 PM Subject: Re: [Google Chat Help] Linux version now available! To: nielsmayer(a)gmail.com NielsMayer has posted an answer to the question "Linux version now available!": FYI, adventures in Installing google talk on fedora 12 x86_64 Linux installation doesn't distinguish between Fedora/OpenSUSE and Debian/Ubuntu linux systems, so you get a download for the wrong distro: -rw-r--r-- 1 npm npm 6926676 2010-08-25 15:47 google-talkplugin_current_amd64.deb Which can be unpacked via ark(1) or file-roller(1) and contains a file data.tar.gz I installed the plugin for chrome/mozilla 64 bit by doing 132 16:01 cd / 134 16:02 sudo tar xvzf ~/Download/data.tar.gz ./opt/google/talkplugin 151 16:11 cd /usr/lib64/mozilla/plugins ## (or /usr/lib ... for 32 bit) 152 16:11 sudo ln -s /opt/google/talkplugin/libnpgoogletalk64.so /opt/google/talkplugin/libnpgtpo3dautoplugin.so . now, about:/plugins shows the existence of the plugin: Google Talk Plugin (2 files) Version: 1.4.1.0 Name: Google Talk Plugin Description: Version: 1.4.1.0 Version: Priority: 1 Location: /opt/google/talkplugin/libnpgoogletalk64.so Disable MIME types: MIME type Description File extensions application/googletalk Google Talk Plugin .googletalk Name: Google Talk Plugin Video Accelerator Description: Google Talk Plugin Video Accelerator version:0.1.43.3 Version: Priority: 2 Location: /opt/google/talkplugin/libnpgtpo3dautoplugin.so Disable MIME types: MIME type Description File extensions application/vnd.gtpo3d.auto O3D MIME . However, back in gmail. clicking on the "call phone" doesn't work.... Issue: gnulem-230-~/Download> /opt/google/talkplugin/GoogleTalkPlugin /opt/google/talkplugin/GoogleTalkPlugin: error while loading shared libraries: libssl.so.0.9.8: cannot open shared object file: No such file or directory Solving: gnulem-236-/usr/lib> sudo ln -s libssl.so.1.0.0a libssl.so.0.9.8 ## note the plugin seems to rely on 32 bit libraries being installed, which fortunately, ## they are even though I have x86_64 system as i've needed to run other 32 bit binaries... Issue: gnulem-245-~> /opt/google/talkplugin/GoogleTalkPlugin /opt/google/talkplugin/GoogleTalkPlugin: error while loading shared libraries: libcrypto.so.0.9.8: cannot open shared object file: No such file or directory Solving: gnulem-247-~> sudo ln -s /usr/lib/libcrypto.so.1.0.0a /usr/lib/libcrypto.so.0.9.8 gnulem-248-~> /opt/google/talkplugin/GoogleTalkPlugin /opt/google/talkplugin/GoogleTalkPlugin: /usr/lib/libcrypto.so.0.9.8: no version information available (required by /opt/google/talkplugin/GoogleTalkPlugin) /opt/google/talkplugin/GoogleTalkPlugin: /usr/lib/libssl.so.0.9.8: no version information available (required by /opt/google/talkplugin/GoogleTalkPlugin) socket(): Address family not supported by protocol socket(): Address family not supported by protocol restarting chrome... and it ... !!!!!!!!!!!!!!!!!!!!!!!! WORKS !!!!!!!!!!!!!!!!!!!!!!!! testing in a call, I'm using an ALSA device that doesn't have input by default gnulem-253-~> /opt/google/talkplugin/GoogleTalkPlugin /opt/google/talkplugin/GoogleTalkPlugin: /usr/lib/libcrypto.so.0.9.8: no version information available (required by /opt/google/talkplugin/GoogleTalkPlugin) /opt/google/talkplugin/GoogleTalkPlugin: /usr/lib/libssl.so.0.9.8: no version information available (required by /opt/google/talkplugin/GoogleTalkPlugin) socket(): Address family not supported by protocol socket(): Address family not supported by protocol socket(): Address family not supported by protocol ALSA lib pcm_dmix.c:957:(snd_pcm_dmix_open) The dmix plugin supports only playback stream Issue: Given my default ALSA device is a dmix device, I now need to totally rework http://nielsmayer.com/npm/dot-asoundrc.txt to make this all useful.... -- Nielsl http://nielsmayer.com

14 years

do qsynth and zynaddsubfx do aftertouch?

by andy baxter

That's the question really - I am using a midi keyboard with these two programs and would like to be able to use the aftertouch on it, but they don't seem to work by default. Does anyone know if there is a way to get this working? Thanks, andy

14 years

Re: [LAU] ceres

by Kjetil S. Matheussen

menno: > > Hi, > > i try to build Ceres0.49. It seems to me that it can build on a recent distro like Ubuntu10.04. > However i'm stuck. I get this output. > Can someone give me a hint on how to proceed? > Have you looked at the INSTALL file? In that file there is a list of packages needed for Fedora. This list is probably quite similar to the packages you need for Ubuntu. gtk+ gtk+-devel libxml-devel python-devel glib-devel gdk-pixbuf-devel imlib-devel jack jack-devel (jack-audio-connection-kit-devel) libsamplerate libsamplerate-devel xbitmaps flex libXmu-devel libXt-devel libXext-devel libXp-devel libXft-devel libXrender-devel fontconfig-devel freetype-devel libjpeg-devel libpng-devel > thank you > Menno > > menno@ubuntu:~/Downloads/ceres-0.49/src$ make > echo "\ > cd packages;\ > sh make_libglade.sh /usr/local/share/ceres;\ > " >makesource.sh > sh makesource.sh > libglade-0.17/ --cut-- > make_libglade.sh: 8: glib-config: not found > make_libglade.sh: 9: glib-config: not found Seems like you are missing the glib-devel package. > checking for gtk-config... no > checking for GTK - version >= 1.2.0... no > *** The gtk-config script installed by GTK could not be found > *** If GTK was installed in PREFIX, make sure PREFIX/bin is in > *** your path, or set the GTK_CONFIG environment variable to the > *** full path to gtk-config. You don't have the gtk devel package. > checking for xml-config... no > configure: error: Couldn't find xml-config > make: *** [packages/libglade_compiled] Error 1 > menno@ubuntu:~/Downloads/ceres-0.49/src$ > You also need the libxml devel package. > > i have libgtk2.0 (2.20.1) and -dev installed. > Doesn't matter. Ceres uses gtk1, not gtk2. Julien Claassen <julien(a)c-lab.de> > Isn't ceres a frontend for csound? No, it has nothing to do with csound. :-)

14 years

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Linux-audio-user August 2010