Linux-audio-user September 2010

linux-audio-user@lists.linuxaudio.org

150 participants
121 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.

2 years, 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

9 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

12 years, 1 month

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/…

13 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.

14 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.

14 years, 9 months

USB audio interface and a buggy USB controller

by Joan Quintana

It seems that my new laptop has a buggy USB controller (lspci says 'Intel Corporation 5 Series/3400 Series Chipset USB2') and this causes JACK to fail in 'duplex mode' and 'only recording mode' $ /usr/bin/jackd -dalsa -dhw:2 -r44100 -p1024 -n2 ... ALSA: could not start playback (Broken pipe) DRIVER NT: could not start driver ... I have an Edirol UA-25EX. I read about this problem in: *http://ubuntuforums.org/showthread.php?p=9812317 where points to *http://lists.linuxaudio.org/pipermail/linux-audio-user/2010-June/070365.html Any idea to deal with the problem? What to do? 1) Try to have the money back 2) Try to use a USB_2_ExpressCard converter like this one? http://www.delock.com/produkte/gruppen/Express-Card/Delock_Express_Card_to_… -> it says linux compatible If this works, the performance will be similar, better or worst? Thanks in advance, Joan Quintana PD. I checked a lot of things and grasped a lot of information thinking in my new laptop for audio production... but I never would thought in the USB chipset.

14 years, 10 months

repeatable jack related segfaults

by Julien Claassen

Hello everyone! I'm experiencing trouble with jack and multiple servers. The moment I start a second jackserver (for net I/O) and try: jack_lsp -s new_name jack_lsp segfaults. If I start jack_netsource first (by accident or should it be that way?) and then start jackd for net I/O, I get a segfault from the new jackd. jackd -N new_name -dnet -r16000 -b8 -i1 -o1 -I0 -O0 -l 5222 [...] creating net driver ... net_pcm|16000|1024|5222|1|1|transport_sync:1 bind error netjack: period : up: 0 / dn: 0 netjack: framerate: 16000 netjack: audio : cap: 1 / pbk: 1) netjack: midi : cap: 0 / pbk: 0) netjack: buffsize : rx: 0) [165384.703633] jackd[21189]: segfault at 8 ip b804f24b sp b6a572c0 error 4 in j ack_net.so[b804a000+a000] Segmentation fault If I start the jackd first and then type jack_lsp -s new_name [165501.994692] jack_lsp[21200]: segfault at 0 ip 08049078 sp bfea7c50 error 4 i n jack_lsp[8048000+2000] Segmentation fault I'm running jackd version 0.119.0 (from svn), a 2.6.30.4 kernel with lowlatency options chosen (no patches though) and if that is of any importance ALSA version 1.0.20. Can someone help here? Kindly yours Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

14 years, 11 months

some apps picked from Linux MAO

by Dave Phillips

Greetings, Scanning the forums at Linux MAO turned up these items of interest : Cyclone - http://revol.altervista.org/cyclone.html Looper with GUI + controls for SooperLooper functions. Aria Maestoso - http://ariamaestosa.sourceforge.net/ "... midi tracker/editor ... offering keyboard, guitar, drum and controller views" Guitar Pro 6 native Linux version - http://www.guitar-pro.com/en/index.php?pg=product Hey, $60(US) gets you GP6. FB01 Sound Editor - http://sourceforge.net/projects/fb01editor/ Patch editor for an old but useful Yamaha 4-operator FM synthesizer. Or maybe everyone already knows about these things and I'm late for the party. :) If your French is up to it, check out Linux MAO at http://www.linuxmao.org/, it's a great site. Best, dp

14 years, 11 months

netjack with jack2

by Julien Claassen

Hello everyone1 I'm still a bit unclear about the use of netjack with jack2. Thjere is the internal netmanager, then there's still jack_netsource. How is the setup built? (an exact command succession based on teh assumption that a standard jack is already running, would be nice). Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

14 years, 11 months

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Linux-audio-user September 2010