Linux-audio-user November 2010

linux-audio-user@lists.linuxaudio.org

123 participants
93 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, 6 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

[ANN] KMidimon 0.7.4 released

by Pedro Lopez-Cabanillas

KMidimon is a MIDI monitor for Linux using ALSA sequencer and KDE4 user interface. Changes in 0.7.4 * requires Drumstick >= 0.5 * load and play OVE files (Overture), contributed by Rui Fan * option to request real-time priority on MIDI input thread * option to (not) resize columns while recording * better reporting of file loading errors * revised universal sysex messages translation Copyright (C) 2005-2010, Pedro Lopez-Cabanillas License: GPL v2 More info http://kmidimon.sourceforge.net Sources http://sourceforge.net/projects/kmidimon/files/ Regards, Pedro

11 years, 2 months

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, 8 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, 2 months

Sound Devices USBpre2

by Kim Cascone

has anyone tried a Sound Devices USBpre2 on Debian/Ubuntu?

13 years, 8 months

Balance between performance and noise

by rosea.grammostola

Hi, When I set cpu scaling with sudo cpufreq-set -g performance, I have the best proaudio performance on my thinkpad T61. But, that will also heat things up very quickly with as consequence more sound from the fans. The laptop is more silent when I use, sudo cpufreq-set -g ondemand, but I get more xruns then. Is it possible to adjust the ondemand settings to find more balance between performance and noise? How? Btw., I use thinkfan to control the temperature and fan speed http://thinkfan.sourceforge.net/ My /etc/thinkfan.conf settings are: sensor /proc/acpi/ibm/thermal (2, 7, 8, 0, 0, 0, 7, 0, 12, 5, 5) (0, 0, 54) (1, 50, 57) (2, 52, 59) (3, 54, 63) (4, 56, 65) (5, 59, 66) (7, 63, 32767) Thanks in advance, /r

13 years, 8 months

[ANN] seq24 0.9.2 released

by Guido Scholz

Dear seq24 users, a new seq24 release is out published by the Seq24team. https://edge.launchpad.net/seq24/ This release fixes a few bugs and provides some new features which mainly extend session functionality; for details please have a look at the news list below. All users should upgrade to 0.9.2. Please find source tarballs on the download page: https://edge.launchpad.net/seq24/+download For ready made packages Ubuntu users may refer to my PPA: https://edge.launchpad.net/~gscholz/+archive/ppa NEWS ==== seq24-0.9.2 (2010-11-27) Fixed Bugs * Fix tooltip usage for older GTK versions (GTK_MINOR_VERSION < 12) * Fix sched_param memory leaks * Fix doubled key event for screen set name line New Features * Add support for jack session, patch provided by Torben Hohn * Add interrupt handler for SIGUSR1 to enable LADISH level 1 support * Add interrupt handler for SIGINT to ask for unsaved file changes * Remove "-f" command line option to be replaced by a simple <filename> argument (see "seq24 --help" for more information) General Changes * Add mnemonics for bottom line widgets in main window and label for screen set name edit line * Add missing command line parameters to help message, display short options as well * Add command line option for program version * Add missing command line parameters to man page * Remove complaints about file read error if configuration files do not exist * Cleanup configure.in: remove unused variables, harmonize option enabling/disabling * Some code cleanups Enjoy Guido -- http://www.bayernline.de/~gscholz/ http://www.lug-burghausen.org/

13 years, 8 months

Re: [LAU] SSD for audio

by rosea.grammostola

On 10/29/2010 02:23 PM, Andrew C wrote: > Hi Rosea, > > Personally, I'd say that given the speed of SSDs, I'd say they'd be > fine for audio. > In terms of the technology used, it's just flash based memory anyway, > so it's not anything particularly new or scary. > Thanks for the replies so far. Till now people seems to be positive about SSD for audio data. More and/ or different views on this? Best regards, \r

13 years, 9 months

controllerism on linux

by Renato

Hi all, any ideas/thoughts on how one would go about to make something similar to this on linux? http://www.youtube.com/watch?v=L2McDeSKiOU I'm speaking of the software side, i.e. supposing you have some midi knobs faders and buttons There's no single thing he does that's rocket science, the hard part IMHO is how to connect it all together so what approach would you take cheers renato

13 years, 9 months

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Linux-audio-user November 2010