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20662 discussions

miniLAC 2016 wiki updates and schedule

by David Runge

Dear Linux Audio Developers/ Users/ LAC organizers, the wiki has seen a major overhaul: http://minilac.linuxaudio.org/ Please head over, enjoy the first stage of the schedule and read updated information! As we're using the wiki to keep track, who is coming (and more importantly how many are coming), please also sign up, if you're only a guest and not explicitely doing an event! We hope you find all the required information. If you think something is missing, please add it to the wiki or contact us (in case you can't)! See you in Berlin in April! Best, David -- David Runge Schreinerstraße 11 10247 Berlin http://sleepmap.de

9 years, 8 months

Weird RME HDSP Error

by Peter P.

Hi, I am getting this in dmesg when I connect my HDSP Multiface via an Expresscard to a Debian testing system which is known to operate these cards: [251636.327240] pci 0000:05:00.0: [10ee:3fc5] type 00 class 0x040100 [251636.327280] pci 0000:05:00.0: reg 0x10: [mem 0x00000000-0x0000ffff] [251636.327491] pci 0000:05:00.0: supports D1 D2 [251636.327496] pci 0000:05:00.0: PME# supported from D0 D1 D2 D3hot [251636.335144] pci 0000:05:00.0: BAR 0: assigned [mem 0xf0000000-0xf000ffff] [251636.335176] pci 0000:05:00.0: no hotplug settings from platform [251636.335274] cannot find the slot for index 1 (range 0-29), error: -16 [251636.335283] snd_hdsp: probe of 0000:05:00.0 failed with error -16 and the red LED on the Audio interface (which indicates an error) stays lit. Re-plugging things doesn't help-can anyone make any sense out of these errors, or has this at least been seen before? thanks for all ideas! Peter

9 years, 8 months

GPIO to alsa

by Raphaël Mouneyres

Hello, Having some bare keyboards and raspberry-sortof boards, I'd be interested in connecting both of them without using a midi interface, but only the available GPIO pins available on the board. This is as well to save external components and as a programming exercise. After searching for information, nothing revelant was found, except a experimental python script to read gpio and using the mididings library to output messages. Is there a existing project which would scan rows/colums of a keyboard from the designated(configured) gpios, and throw midi message to an alsa midi port ? Would such a program better be a kernel module or a userland program ? Thanks for your advice Raphaël

9 years, 8 months

Raspberry Pi2 crashes with jconvolver/jack/squeezelite/Squeezebox server

by bricolodu

Hello, I have a RPI2 that is used as a Squeezebox Server, a Squeezebox Player (Squeezelite) and that does Room correction with Jackd and jconvolver. It is running with a RT kernel. CPU usage is around 35% (9% to 11% for each of the following services : Jackd, Jconvolver, Squeezelite) Mem usage is around 30% (same as above) After a few minutes the Pi crashes. I tried both : jackd -d alsa -r 44100 -p 1024 -n 2 -P -s and jackd -d alsa -r 44100 -p 256 -n 2 -P -s with no significative difference <http://linux-audio.4202.n7.nabble.com/file/n99101/Capture_d_%C3%A9cran_2016…> I also played with priorities, affinity, RT sched here again, with no significative difference I also tried BruteFIR CPU usage is even less. Nevertheless, Rpi2 crashes after a while. <http://linux-audio.4202.n7.nabble.com/file/n99101/Capture_d_%C3%A9cran_2016…> I have added to my config.txt framebuffer_depth=32 framebuffer_ignore_alpha=1 Once again, with no significative difference What do you suggest ??? I have also read on the net that Rpi2 has NEON and that it might help, if so, how could I enable it ? Any help would be much appreciated. Thank you all Jean -- View this message in context: http://linux-audio.4202.n7.nabble.com/Raspberry-Pi2-crashes-with-jconvolver… Sent from the linux-audio-user mailing list archive at Nabble.com.

9 years, 8 months

No Sis

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

9 years, 8 months

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" }

9 years, 8 months

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.

9 years, 8 months

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

9 years, 8 months

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/

9 years, 8 months

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

9 years, 8 months

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