Linux-audio-user December 2010

linux-audio-user@lists.linuxaudio.org

138 participants
152 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, 9 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, 4 months

[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, 5 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, 12 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, 5 months

Call for submissions: Music made with Linux - Best of 2010

by Patrick Shirkey

Hi, I'm compiling the 2010 mix at the moment. Unfortunately I lost a few months worth of data between Jan - May. If you released a track during that time and you would like it to be considered for the 2010 mix please send me a link so I can download it again. Also if you have unreleased tracks or tracks that are not easily downloaded then I may have missed them. So feel free to shoot me a direct link if you want to get them into the official mix. The past couple of years I ended up with about 40 tracks that made the cut. It would be nice to have even more this year. There is no discrimination on genre/content. The criteria is if it sounds good and/or represents an original or unique idea compared to the rest of the tracks in the final mix. All the tracks are hosted on djcj.org http://djcj.org/audio/lam/ and we even have an icecast stream at linuxaudio.org which Robin Gareus setup last year. http://radio.linuxaudio.org/ Cheers. -- Patrick Shirkey Boost Hardware Ltd.

13 years, 10 months

Sound Devices USBpre2

by Kim Cascone

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

13 years, 11 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, 11 months

[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

13 years, 11 months

Showcasing a new track on Neil Modular Track

by Vytautas Jancauskas

Here is a track I made on Neil Modular Track which I also develop. http://www.youtube.com/watch?v=qsVA5p2iHVM You can get it here: https://sites.google.com/site/neilsequencer/ -- "Cheshire-Puss," she began, "would you tell me, please, which way I ought to go from here?" "That depends a good deal on where you want to get to," said the Cat. "I don't care much where--" said Alice. "Then it doesn't matter which way you go," said the Cat.

13 years, 11 months

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Linux-audio-user December 2010