Linux-audio-user February 2016

linux-audio-user@lists.linuxaudio.org

69 participants
61 discussions

by Philip Yassin

Hi everyoneÂ 8) My new song "No Sister" is out, it's a playful tale of a dying reality. https://goo.gl/ABbj2W Basically same production details (Ubuntu LowLatency, Qtractor, Calf, JAMin) as the other songs on the album. NB: First time I use Blender VSE <https://www.blender.org/manual/de/editors/sequencer/index.html> for video editing, and I'm pretty sure I'll never use anything else again ; I was just hurting myself. I Hope you'll enjoy it, it's free. And *pleaseÂ²* *share* it even if you don't. I know I do :) Y Phil -- Philippe "xaccrocheur" Yassin http://manyrecords.com http://bitbucket.org/xaccrocheur /https://github.com/xaccrocheur

8 years, 1 month

jack2 package for Arch Linux, to get rid of the freewheeling bug

by Ralf Mardorf

Hi, I noticed that the AUR jack2-git package has got an odd versioning and perhaps it's more comfortable to name the package jack2, if the package from git should be just a temporarily solution. I didn't test the build package, but it builds well, most likely will work and it might save you some time, if you don't need to edit the PKGBUILD too. jack2-git 1.9.10-g1ed50c9 or most likely a more current version from git too, is needed to get rid of the freewheeling bug, that's why I edited the AUR jack2-git PKGBUILD. It's a dirty edit, but should work and perhaps is still more clean than the original jackd2-git, https://aur.archlinux.org/packages/jack2-git/ ;). The information is from: Date: Wed, 24 Feb 2016 00:38:22 +0100 From: Robin Gareus To: ardour-users(a)lists.ardour.org Subject: Re: [Ardour-Users] Export hangs after script executing [snip] 1.9.11 (actually git: 1.9.10-g1ed50c92) is known to be good WRT to this freewheeling bug. Arch Linux PKGBUILD: Ralf_Mardorf commented on 2016-02-27 18:15 https://aur.archlinux.org/pkgbase/jack2-git/#news Hi, consider to give the package an appropriated version number. Instead of [rocketmouse@archlinux jack2]$ git rev-list --count master 3425 the following to me is more reasonable: [rocketmouse@archlinux jack2]$ git describe|cut -d"v" -f2|sed -r 's/^V//;s/([^-]*-g)/r\1/;s/-/./g' 1.9.10.r177.g7bdad49 Oops, resp.: [rocketmouse@archlinux jack2]$ git describe|sed -r 's/^v//;s/([^-]*-g)/r\1/;s/-/./g' 1.9.10.r177.g7bdad49 The correct dependency seems to be "python2-dbus" and not "python2". Assumed somebody temporarily wants to build jack2 from git, but switch back to jack2 from the official repository, as soon as 1.9.11 is released, you could replace the original PKGBUILD by this one [1]. To replace .SRCINFO after replacing the PKGBUILD run makepkg --printsrcinfo > .SRCINFO Regards, Ralf [1] [rocketmouse@archlinux jack2-rocketmouse]$ cat PKGBUILD pkgbase=jack2 pkgname=('jack2' 'jack2-dbus') #pkgname= # single build (overrides split) _tarname=jack pkgver=1.9.10.r177.g7bdad49 pkgrel=1 arch=('i686' 'x86_64') url="http://jackaudio.org/" backup=(etc/security/limits.d/99-audio.conf) license=('GPL') makedepends=('python2-dbus' 'celt' 'opus' 'libsamplerate' 'git' 'libffado') source=("git+https://github.com/jackaudio/jack2" '99-audio.conf' '40-hpet-permissions.rules') md5sums=('SKIP' 'ae65b7c9ebe0fff6c918ba9d97ae342d' '471aad533ff56c5d3cbbf65ce32cadef') _gitname='jack2' _pyfix() { sed -i 's:bin/env python:bin/env python2:' \ "$pkgdir/usr/bin/jack_control" } _wafconf() { # default=64, AUR=128, kxstudio=256 --clients= # default=768, AUR=1536, kxstudio=2048 --ports-per-application= python2 waf configure --prefix=/usr \ --clients=64 --ports-per-application=768 \ --alsa --firewire $@ } _isbuild() { printf "%s\n" ${pkgname[@]} | grep -qx $1 } pkgver() { cd jack2 echo $(git describe|cut -d"v" -f2|sed -r 's/^V//;s/([^-]*-g)/r\1/;s/-/./g') } prepare() { # we may do 2 different builds cp -r $_gitname $_gitname-dbus } build() { cd "$srcdir" # mixed dbus/classic build if _isbuild jack2; then cd $_gitname msg2 "Running Mixed D-Bus/Classic build" _wafconf --classic --dbus python2 waf build $MAKEFLAGS cd .. fi # dbus-ONLY build if _isbuild jack2-dbus; then cd $_gitname-dbus msg2 "Running D-Bus-only build" _wafconf --dbus python2 waf build $MAKEFLAGS cd .. fi } package_jack2() { ! _isbuild jack2 && return 0 pkgdesc="The next-generation JACK with SMP support" depends=('libsamplerate' 'opus' 'celt' 'libffado') optdepends=('python2-dbus: jack_control') conflicts=('jack') provides=('jack' 'jackmp' 'jackdmp' 'jackdbus') cd "$srcdir/$_gitname" python2 waf install --destdir="$pkgdir" # fix for major python transition _pyfix # configure realtime access/scheduling install -Dm644 "$srcdir/99-audio.conf" \ "$pkgdir/etc/security/limits.d/99-audio.conf" install -Dm644 "$srcdir/40-hpet-permissions.rules" \ "$pkgdir/usr/lib/udev/rules.d/40-hpet-permissions.rules" } package_jack2-dbus() { ! _isbuild jack2-dbus && return 0 pkgdesc="The next-generation JACK with SMP support (for D-BUS interaction only)" depends=('libsamplerate' 'celt' 'opus' 'libffado') optdepends=('python2-dbus: jack_control') conflicts=('jack' 'jack2') provides=('jack' 'jack2' 'jackmp' 'jackdmp' 'jackdbus') cd "$srcdir/$_gitname-dbus" python2 waf install --destdir="$pkgdir" _pyfix install -Dm644 "$srcdir/99-audio.conf" \ "$pkgdir/etc/security/limits.d/99-audio.conf" install -Dm644 "$srcdir/40-hpet-permissions.rules" \ "$pkgdir/usr/lib/udev/rules.d/40-hpet-permissions.rules" }

8 years, 1 month

Re: [LAU] Looking for Repeater/Stutter Plugin

by Gerald Mwangi

Oh silly me :) On 26.02.2016 11:06, Mathias Buhr wrote: > Hi Gerald, > > I think this was supposed to go to LAU and not me directly :) > > Regards, > Mathias > > On 26.02.2016 09:46, Gerald Mwangi wrote: >> I can recommend Sequent from Loomer >> (http://www.loomer.co.uk/sequent.htm). While not open source, it is >> definitely worthwhile using. >> Gerald / JimsonDrift >> >> On 26.02.2016 09:39, Mathias Buhr wrote: >>> On 02/25/2016 05:01 PM, Johannes Kroll wrote: >>>> Hi! >>>> >>>> I am looking for a repeater/stutter plugin.

8 years, 1 month

LAC is dead! Long live miniLAC!

by David Runge

Hello Linux Audio Community! This is the announcement you have been waiting for. We've come to the conclusion that doing a full LAC at the announced date is impossible, as our sponsoring setup didn't work out, therefore we have decided to go ahead with a miniLAC instead. Since we have already planned a lot of stuff, we thought it would be a shame to let all the work go to waste, so we asked a few people whether they'd be interested in a more compact and reduced conference program. What we can currently offer with the resources available are: * a lecture track * workshop tracks (one of which will use the c-base soundlab) * live audio sessions * hacking sessions * tours around interesting berlin places * linux audio nights This miniature version of a Linux Audio Conference is still planned to take place during the (kind of) announced date: 8.-10. April 2016. The location is now set: c-base, the spacestation below Berlin Mitte (http://c-base.org) Our plan is to start off on Friday with a meet-and-greet evening at c-base, where we will have an open stage for anyone who wants to connect their devices. Since we don't have the originally intended resources, we will have to limit attendance to around 150 participants. Additionally, if there is interest for this (especially for people arriving earlier), we'll try to organize optional visits to other Berlin locations on Friday 8. April. Please create an account on our wiki, to be able to set things up with us: http://frab.linuxaudio.org (will later move on to http://minilac.linuxaudio.org). The wiki is still a work in progress, but should feature all necessary information by the end of the week. To satisfy your academic paper skills, we intend to support another crew that could organize a second conference part at the FrosCon 2016 (http://www.froscon.de/), which is happening in Bonn 20th and 21st of August. Here is a link to our issue concerning this topic on Github: https://github.com/linux-audio-berlin/LAC16/issues/30 We hope to see you at the miniLAC16! Cheers, miniLAC16 Orga team

8 years, 1 month

MOD and OpenAV on FLOSS Weekly Interview

by Harry van Haaren

Hi All, Just a note that today(Tuesday 23rd) OpenAV Productions[1] and MOD[2] will be interviewed by the FLOSS Weekly show. Live link, 5:30 pm Irish / UK time: https://twit.tv/live Use this link to figure out what time that is in your time-zone :) http://www.timeanddate.com/worldclock/fixedtime.html?msg=OpenAV+and+MOD+on+… Have a question during the show? Join the #irc room, details at [3]! Cheers, -Harry -- [1] http://www.openavproductions.com [2] http://moddevices.com [3] http://openavproductions.com/floss-weekly-interview-with-mod/

8 years, 1 month

Re: [LAU] What exactly is JACK DSP % usage ?

by Chris Caudle

On Tue, February 23, 2016 8:32 am, Jonathan Brickman wrote: > So, if one has a lot of things happening, multiple JACK > instances could make more use of available resources? I don't think that follows. That seems to me that you are asking if since you have a lot of processing going on, would adding additional overhead help. If you have multiple processing chains that do not depend on one another, then using jack2 may help, it can take advantage of multiple processor cores. I don't know if that would help with the two yoshimi instances or not, but since you do not appear to be CPU limited, then probably not. Real time operation is often more about overhead, the minimum amount of time it takes for the OS to switch between user mode and kernel mode, the time it takes the scheduler to determine the next process to run, the amount of time it takes the kernel to read the current state of the interrupt controller and call interrupt handlers, things like that. A lot of those things take fixed amounts of time, so the best thing you can do for a given system is to try to do them less often, i.e. larger buffers. For given hardware you may be able to change the system behavior by modifying firmware settings, like turning off hyperthreading/SMT, or changing power saving features. Probably those are documented in some wiki somewhere, but I can't find it on the jackaudio.org wiki at the moment. Of course you have to start by making sure that the OS runs the real-time tasks first, and does not perform general OS housekeeping tasks when there is real-time work to be done. That is the point of the -RT kernel patches and to a lesser extent the low-latency config option in the unpatched kernel tree. -- Chris Caudle

8 years, 1 month

Is there a GUI for convolver?

by david

When I tried to use it sometime ago, puzzling through the docs that came with it left me just puzzled, without anything convolved. (Sorry, maybe I'm just stupid.) -- David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com

8 years, 1 month

Re: [LAU] Multiple asynchronous JACK chains resampled?

by Chris Caudle

On Tue, February 23, 2016 11:40 am, Jonathan Brickman wrote: > and short chain -- IP inputs to zita-njbridge to hardware -- which has > to be synchronous with the physical audio chipset. So the DSP % > usage on the hardware-connected chain becomes low, because > it is as simple as it is, and each of the chains in action have a lot > less also, distributing the work carefully. This seems like a pretty complicated scheme. What is your actual end goal? What do you want to happen differently than your current situation? Is it just that at 85% DSP usage your system is not capable of running anything additional, and you want to run additional processes? If that is all, then first try adjusting the latency of your current setup to be equivalent to the latency you will have with the Rube Goldberg setup of a stack of dinky little ARM processors connected together with resampling through a network. If you read the zita-njbridge man page you see that the minimum latency is the sum of the periods of each asynchronous connection, so at minimum double your current latency, plus resampling latency, plus network delay. So for a start set your system latency to 2x or 3x what you currently have and see how that works. -- Chris Caudle

8 years, 1 month

What exactly is JACK DSP % usage ?

by Jonathan E. Brickman

Eight-core, 4GHz AMD, 8G RAM. Running a lot of things all at once, 60 high-demand tones out of two Yoshimis (120 total), JACK DSP % usage is 85%, but CPU usage through htop is a different thing, one CPU is being kept by one Yoshimi at 64%, the rest less than 15% and some down to 1-2%. JACK is not stressing any CPU! So my primary question is, what is JACK DSP % usage, what are its limiting factors? -- Jonathan E. Brickman jeb(a)ponderworthy.com (785)233-9977 Hear us at http://ponderworthy.com -- CDs and MP3 now available! <http://ponderworthy.com/ad-astra/ad-astra.html> Music of compassion; fire, and life!!!

8 years, 1 month

[ANN] Vee One Suite 0.7.3 - The Ninth beta release

by Rui Nuno Capela

Vee One Suite 0.7.3 - The Ninth beta release -------------------------------------------- The 'Vee One Suite' aka. 'the gang of three' old-school software instruments, synthv1 [1] polyphonic synthesizer, samplv1 [2] polyphonic sampler and drumkv1 [3] drum-kit sampler, are now released in their ninth official beta iteration. All available in dual form: - a pure stand-alone JACK [4] client with JACK-session, NSM [5] (Non Session management) and both JACK MIDI and ALSA [6] MIDI input support; - a LV2 [7] instrument plug-in. In common to all three comes the spartan change-log: - Avoid out-of-bound MIDI events as much as possible, coping with LV2 plug-in hosts that feed/run them in on border line circumstances (as reported by Thorsten Wilms, on suspected Ardour looping crash/bug, probably fixed already, thanks). - Tentatively safe defaults are being introduced to internal OUT FX buffer-sizes, as read from JACK buffer-size changes and LV2 block-length instantiation bound options. - Added application keywords to freedesktop.org's AppData. The Vee One Suite are free, open-source Linux Audio [9] software, distributed under the terms of the GNU General Public License (GPL) [8] version 2 or later. And here they are again! **synthv1 - an old-school polyphonic synthesizer [1]** synthv1 0.7.3 (ninth official beta) is released! synthv1 is an old-school all-digital 4-oscillator subtractive polyphonic synthesizer with stereo fx. LV2 URI: http://synthv1.sourceforge.net/lv2 website: http://synthv1.sourceforge.net downloads: http://sourceforge.net/projects/synthv1/files - source tarball: http://download.sf.net/synthv1/synthv1-0.7.3.tar.gz - source package: http://download.sf.net/synthv1/synthv1-0.7.3-26.rncbc.suse.src.rpm - binary packages (openSUSE Tumbleweed): http://download.sf.net/synthv1/synthv1-0.7.3-26.rncbc.suse.i586.rpm http://download.sf.net/synthv1/synthv1-0.7.3-26.rncbc.suse.x86_84.rpm git repos: http://git.code.sf.net/p/synthv1/code https://github.com/rncbc/synthv1 **samplv1 - an old-school polyphonic sampler [2]** samplv1 0.7.3 (ninth official beta) is released! samplv1 is an old-school polyphonic sampler synthesizer with stereo fx. LV2 URI: http://samplv1.sourceforge.net/lv2 website: http://samplv1.sourceforge.net downloads: http://sourceforge.net/projects/samplv1/files - source tarball: http://download.sf.net/samplv1/samplv1-0.7.3.tar.gz - source package: http://download.sf.net/samplv1/samplv1-0.7.3-26.rncbc.suse.src.rpm - binary packages (openSUSE Tumbleweed): http://download.sf.net/samplv1/samplv1-0.7.3-26.rncbc.suse.i586.rpm http://download.sf.net/samplv1/samplv1-0.7.3-26.rncbc.suse.x86_84.rpm git repos: http://git.code.sf.net/p/samplv1/code https://github.com/rncbc/samplv1 **drumkv1 - an old-school drum-kit sampler [3]** drumkv1 0.7.3 (ninth official beta) is released! drumkv1 is an old-school drum-kit sampler synthesizer with stereo fx. LV2 URI: http://drumkv1.sourceforge.net/lv2 website: http://drumkv1.sourceforge.net downloads: http://sourceforge.net/projects/drumkv1/files - source tarball: http://download.sf.net/drumkv1/drumkv1-0.7.3.tar.gz - source package: http://download.sf.net/drumkv1/drumkv1-0.7.3-22.rncbc.suse.src.rpm - binary packages (openSUSE Tumbleweed): http://download.sf.net/drumkv1/drumkv1-0.7.3-22.rncbc.suse.i586.rpm http://download.sf.net/drumkv1/drumkv1-0.7.3-22.rncbc.suse.x86_84.rpm git repos: http://git.code.sf.net/p/drumkv1/code https://github.com/rncbc/drumkv1 References: [1] synthv1 - an old-school polyphonic synthesizer http://synthv1.sourceforge.net/ [2] samplv1 - an old-school polyphonic sampler http://samplv1.sourceforge.net/ [3] drumkv1 - an old-school drum-kit sampler http://drumkv1.sourceforge.net/ [4] JACK Audio Connection Kit http://jackaudio.org/ [5] NSM, Non Session Management http://non.tuxfamily.org/nsm/ [6] ALSA, Advanced Linux Sound Architecture http://www.alsa-project.org/ [7] LV2, Audio Plugin Standard, the extensible successor of LADSPA http://lv2plug.in/ [8] GNU General Public License http://www.gnu.org/copyleft/gpl.html [9] Linux Audio consortium of libre software for audio-related work http://linuxaudio.org See also: http://www.rncbc.org/drupal/node/1008 Enjoy && keep the fun ;) -- rncbc aka. Rui Nuno Capela

8 years, 1 month

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Linux-audio-user February 2016