Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

3 participants
7448 discussions

by Patrick Shirkey

On Wed, July 2, 2014 5:16 am, drew Roberts wrote: > On Tue, Jul 1, 2014 at 11:34 AM, Patrick Shirkey > <pshirkey(a)boosthardware.com >> wrote: > >> >> On Tue, July 1, 2014 10:41 pm, drew Roberts wrote: >> > On Tue, Jul 1, 2014 at 5:34 AM, Patrick Shirkey >> > <pshirkey(a)boosthardware.com> >> > wrote: >> > >> >> Hi, >> >> >> >> Does anyone have a suggestion for open source solutions to enable >> >> streaming AV/midi to multiple ARM mobile devices with a one to many >> >> network configuration? >> >> >> >> >> >> - Icecast is very good at serving audio but iiuc does not support >> >> video/midi >> >> >> >> >> > IIRC, icecast2 can stream video. Never thought to try midi. >> > >> >> According to the icecast folks the latency and sync for a standard >> stream >> can get out to 10 seconds which is outside of my range. I could probably >> handle upto 2000ms but less than 1000ms is preferable. >> > > What are you thinking of using to do the "shouting"? IIRC, we were using > vlc. > For this project I will probably have to build a custom tool that uses ffmpeg for transcoding. VLC might be a good place to start but the codebase is pretty large if I have to customise it so it's probably faster to start from scratch. > Concerning the sync, if you mean audio with video, what we were doing did > not require synced audio. > This project probably doesn't require realtime sample accurate sync but the latency should be within 2000ms between audio and video streams and also between master/client. Latency should be as low as possible with a balance between cpuload and bandwidth management. Has anyone benchmarked realtime transcoding on dual core arm devices with ffmpeg? >> >> Anyway I will give icecast with video a test run before I rule it out. >> >> >> -- >> Patrick Shirkey >> Boost Hardware Ltd >> __________________ >> > > all the best, > > drew > -- > http://freemusicpush.blogspot.com/ > -- Patrick Shirkey Boost Hardware Ltd

10 years, 3 months

The modular audio chronicles ep. 1

by Etienne Rouge

(Here is an unusual mail trying to describe as entertainingly as possible what it's like to set up a modular production environment in GNU/Linux. I owe the greatest of respect to anyone who've made the softwares mentioned below and their work do not misunderstand a joke for a blunt critic. ) Dear Lads, You haven't heard much from me lately, and I'm sorry for that. For one year and a half I've been sitting in front of my minimal -yet fairly high endish - music production set up doing nothing but programming. Those expensive things were only used to playback cd and digital files... ... you know what that means : I was becoming an audiophile. Holly horse poop, I can't beleive I said that... but it's true. Few weeks ago, realizing this dreadful fact- I decided to start a rehab : let's fire up the preamp and let's record some stuffs. Just to prove the world I'm not just another bragging gear slut (hopefully). Of course, just to make things harder I decided not to use the full-featured highly expected (and probably amazing) Ardour 3. Why not ? Because I've suffered 8 years of (gnu's not)Unix propaganda and now I praise "modularity" above anything else. Mh, and I guess 27 years of Legos(tm) didn't help neither (Don't judge me, Technics are a great prototyping tool. ... . That's the best excuse I have). Lately, thanks to nedko (gladish), male (non-suite), drobilla (patchage, ingen), falktx (Carla) (I always have to check the letters order for this one nick :/) and few others,goal my has become -somehow- tangible. Part one : THE SETUP When you start a big music project with high expectations with GNU/linux you need two things : 1) Make sure not to have a deadline 2) Make sure you are fully relaxed Cause, you know how it is : those softwares are all quite young and only used by few people. Therefore, "few people" means very few bug reports. And of course those softs are made by volunteers who can only solve them when they have enough time. Considering all this, it's already great everything works ! Having few bugs every once in a while in a software is no big deal... But the thing with modular audio, by definition, is that you're gonna use dozens of them. At once. And bugs DO stack. But I'm rushing a bit, we're not there yet, cause at this point of the story I haven't picked my softwares already (except for the non-suite). I don't have any effects nor midi anything : I need to gather some more stuffs to work with. And I must say I felt a bit like Indiana Johns having to gather some pieces of a mysterious puzzle : "Your six strings shall sound heavenly and You synths shall have many melodies. and you will have to travel the Internet to find what you need." Ok, the guitar part is an easy one : guitarix. It's just amazing. Let's use it... and ! Oh gosh ! It's a trap ! There's no way to recall a preset, it not patched with NSM... quick ! Use CLI, they MUST have a "import" option ! Oh crap NO ! They don't ! I thought my quest would be easy but no. Instead of being able to pick guitarix, I found a new quest : "use the LV2 version". No big deal, let's just move to another place. Carla. it usually works fine... but...gosh all my plugins are here except the amp simulator... what the heck ? Ingen then... erf... no, for some reasons this plugin doesn't make a sound. Damn. Back to Carla... with another quest : "You shall not use the Stable version. Use the git version". It's gonna be harder than I thought. Building is usually a piece of cake... but not this one time. Eventually, in a last desperate attempt, I tried one more build, and succeed.... Until QT5 -my trusted friend for years- suddenly decides to betray me by placing booby traps all over the place to make sure I'm not able to add any effect. Luckily, the scientist in the team -Falktx- has been able to diffuse those. Finally ! Now I have a guitarix preset I can save and load with NSM. Holly crap. Everything's set for the guitar. It's tome to move on to our glorious quest for MIDI. This quest was such a weird experience. I went to the vaste land of Rosegarden, where the GUI almost made me blind and mad. I tried the purity of a non-sequencer until it exploded right in my face. I went to an oddly useless 1 bar non-chromatic sequencer... Ok. It's gonna Seq24 then. It's not perfect, but I can use it.... Let's just call the maintainer to fix the few problems... or not. Nobody's actually taking care of this software. Screw it. I'll use it anyway. It's been a week already, and most of the musicians in my party have given up for an easier world where you can buy peace. I've been able to make some sounds and that's what keeps me going... I don't know how long this will take, but I'll gather all the pieces of this modular music machine. Eventually with the help of the LAD's scientist, it'll work properly. Let's keep faith. Love. Tumulte. P.S. : As tedious as it was, I'm still thrilled by the potential of a well integrated modular audio software suite. I must say I'm even more exited when I see what's *already* possible today. Therefore I'd like to make a call for a working group around this question cause it's really (*really*) close to something great. I believe that a nice dialog between users trying to setup real production environments and coders can quickly bring out a kick-ass suite that can bring linux audio to the next level. P.P.S : all the best, and thanks for reading.

10 years, 3 months

[paul@linuxaudiosystems.com: [Jack-Devel] jackaudio.org website shut down due to hacking]

by Adrian Knoth

Hi! I'm sure there must be users out there who are familiar with web stuff and are burning to help their favourite inter-application audio framework. ;) Step up, please. PS: There is also a semi-complete move to GH-pages. If your're familiar with github, you could be the ideal volunteer. ;) Cheers ----- Forwarded message from Paul Davis <paul(a)linuxaudiosystems.com> ----- Date: Fri, 30 May 2014 11:56:02 -0400 From: Paul Davis <paul(a)linuxaudiosystems.com> To: JACK <jack-devel(a)lists.jackaudio.org> Subject: [Jack-Devel] jackaudio.org website shut down due to hacking The malicious conscience-free leeches who push pharmaceutical spam managed to hack into jackaudio.org in a very deep way. They had full access to everything including the ability to fiddle with MySQL tables (some of them). I don't consider any part of the Drupal site safe, so I have shut it down and replaced it with a single static index.html file. The source tarballs for JACK1 were uncorrupted (probably JACK2 also - waiting for confirmation from Stephane on this), and I have put up a new link to the most recent. I also referenced github for the source code repository and issue tracker. As someone said on IRC today " It's a shame the lead dev has to waste his time coding, answering user questions AND fixing drupal backdoors " If someone else wants to volunteer to resurrect the roughly 60 pages of content that were at jackaudio.org (and realistically, it is probably more like 20 of real stuff that is needed), get in touch. I can give you full access to everything you will need. _______________________________________________ Jack-Devel mailing list Jack-Devel(a)lists.jackaudio.org http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org ----- End forwarded message ----- -- mail: adi(a)thur.de http://adi.thur.de PGP/GPG: key via keyserver

10 years, 3 months

[ANN] Vee One Suite 0.5.0 - Officially beta now!

by Rui Nuno Capela

Greetings, The Vee One Suite of old-school soft(ware)-instruments, primarily slated for Linux, featuring synthv1 [1], a polyphonic synthesizer, samplv1 [2], a polyphonic sampler and drumkv1 [3], a drum-kit sampler, are officially in beta phase now. Change-log for the new release: - LV2 UI Idle and Show interfaces support added. - First attempt to allow a headless stand-alone JACK client application run mode, without a GUI, with option given as command line argument (--no-gui). - A man page has beed added (re. stand-alone JACK client). - Reverse sample option and parameter knob added. (samplv1 and drumkv1 only). - Allow the build system to include an user specified LDFLAGS. As before, all made 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. The Vee One Suite are free and open-source Linux Audio software, distributed under the terms of the GNU General Public License (GPL) [8] version 2 or later. The fine print follows ;) * synthv1 - an old-school polyphonic synthesizer [1] * synthv1 0.5.0 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.sourceforge.net/synthv1/synthv1-0.5.0.tar.gz - source package: http://download.sourceforge.net/synthv1synthv1-0.5.0-17.rncbc.suse131.src.r… - binary packages: http://download.sourceforge.net/synthv1synthv1-0.5.0-17.rncbc.suse131.i586.… http://download.sourceforge.net/synthv1synthv1-0.5.0-17.rncbc.suse131.x86_8… * samplv1 - an old-school polyphonic sampler [2] * samplv1 0.5.0 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.sourceforge.net/samplv1/samplv1-0.5.0.tar.gz - source package: http://download.sourceforge.net/samplv1/samplv1-0.5.0-17.rncbc.suse131.src.… - binary packages: http://download.sourceforge.net/samplv1/samplv1-0.5.0-17.rncbc.suse131.i586… http://download.sourceforge.net/samplv1/samplv1-0.5.0-17.rncbc.suse131.x86_… * drumkv1 - an old-school drum-kit sampler [3] * drumkv1 0.5.0 released! drumkv1 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.sourceforge.net/drumkv1/drumkv1-0.5.0.tar.gz - source package: http://download.sourceforge.net/drumkv1/drumkv1-0.5.0-13.rncbc.suse131.src.… - binary packages: http://download.sourceforge.net/drumkv1/drumkv1-0.5.0-13.rncbc.suse131.i586… http://download.sourceforge.net/drumkv1/drumkv1-0.5.0-13.rncbc.suse131.x86_… 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 See also: http://www.rncbc.org/drupal/node/793 Enjoy && ever again, have fun. -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

10 years, 3 months

LAC'14 video archive

by Robin Gareus

Hi all, The video recordings of the LAC'14 presentations have just been uploaded to the conference website and are now directly linked from the archive: http://lac.linuxaudio.org/2014/program There are still a three videos missing and the workshop videos are also yet to come. Currently they are also only available as vp8/vorbis/webm (sorry IE and Safari users). But since it has been quite a while already, we decided to not hold back the release of these already finished videos any further. Once the collection is complete, we will provide a .torrent. Meanwhile, for those who prefer to download the videos incrementally, they are accessible via rsync://linuxaudio.org/ [1]. Many thanks for Frank and Moritz to get those done in really outstanding quality this year. Kudos to the complete stream-team. enjoy, robin - for the LAC'14 team [1] example to get the 720p versions: rsync -Pa --exclude "*360p.webm" \ rsync://linuxaudio.org/lac2014/ \ lac2014/

10 years, 3 months

Creative Music Coding lab #12 in Amsterdam

by nescivi

Calling all ChucK’ers, SuperColliders, Max and PureData patchers, CSounders, Fluxites, Overtoners, and all other tongues of creative coders. We welcome you to attend the fifth edition of the Creative Music Coding lab at STEIM. The CMC lab is an autonomous zone to try out sonic experiments as a group. And an opportunity to leverage the expertise of the group in realizing new artistic tools and processes through the medium of code. Many of the founding members of the group are indeed experts in their favorite languages, but we come from all technical levels of proficiency and enjoy helping one-another out. http://steim.org/event/creative-music-coding-lab-12/ DETAILS DATE: Tuesday, 24 June 2014 TIME: 19:30 ENTRY: FREE LOCATION: STEIM Concert Space, Utrechtsedwarsstraat 134 Amsterdam What ARE the goals for the lab? * a place for creative music coders to show work in progress, regardless of programming language or platform * a place to discuss and question techniques with fellow computer musicians * an informal stage for playing with others, livecoding sessions, jamming, and other fun experiments * an opportunity to meet like-minded artists, share talents, and start new collaborations * an opportunity to be exposed to new languages and improve cross-language fluency * a way to discover lesser known and emerging creative programming paradigms * a place to to discuss interconnections between programming environments * an environment for discussions on cultural contexts surrounding coding in the arts We encourage members of the group to use this as a platform for exploring ways in which we might be able to create and play together. Proposals for creative group investigations of hardware, software, and coding as process are welcome. As always, entry is free, tea and coffee will be provided.

10 years, 3 months

Strange inconsistency in jack frame time

by Fons Adriaensen

Hello all, While putting the finishing touches on zita-njbridge and doing a lot of testing I stumbled on this strange behaviour of jack's frame time. Let F(i) be the frame time corresponding to the start of period 'i', and U(i) the corresponding microseconds time. If jack for whatever reason skips some periods, then one would expect the difference of F(i) and U(i) to be consistent. They are in some but not in all cases. This is the output from a test. When the frame time makes an unexpected jump, it prints the difference of F, the difference in U converted to frames, and the difference of these two. Period size is 256 frames. dframes = 768 769.0 1.0 dframes = 1024 1322.8 298.8 dframes = 1024 1024.7 0.7 dframes = 768 1067.3 299.3 dframes = 1024 1023.7 -0.3 dframes = 768 1068.5 300.5 dframes = 768 769.2 1.2 dframes = 768 1067.3 299.3 dframes = 1024 1023.9 -0.1 dframes = 1024 1323.1 299.1 dframes = 768 768.2 0.2 dframes = 768 1066.7 298.7 The cases where F and U match are due to starting another client (designed to be 'heavy'), those where F and U do not match occur when the same client is terminated (using ^C). The error for those is consistently a full period plus around 4333 frames. So it seems that the frame time is not a reliable method to determine how many frames have been lost. Using jack1, 0.124.1 Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow)

10 years, 3 months

[ANN] QmidiNet 0.2.0 is out!

by Rui Nuno Capela

Headless finally! QmidiNet 0.2.0 is out! all that is to say that it may now run without the GUI, eg. qmidinet --no-gui QmidiNet [1] is a MIDI network gateway application that sends and receives MIDI data (ALSA-MIDI and JACK-MIDI) over the network, using UDP/IP multicast. Inspired by multimidicast [2] and designed to be compatible with ipMIDI [3] for Windows. See also: http://www.rncbc.org/drupal/node/790 Website: http://qmidinet.sourceforge.net Project pages: http://sourceforge.net/projects/qmidinet Downloads: - source tarballs: http://downloads.sourceforge.net/qmidinet/qmidinet-0.2.0.tar.gz - source package (openSUSE 13.1): http://downloads.sourceforge.net/qmidinet/qmidinet-0.2.0-3.rncbc.suse131.sr… - binary packages (openSUSE 13.1): http://downloads.sourceforge.net/qmidinet/qmidinet-0.2.0-3.rncbc.suse131.i5… http://downloads.sourceforge.net/qmidinet/qmidinet-0.2.0-3.rncbc.suse131.x8… Weblog (upstream support): http://www.rncbc.org License: QmidiNet is free, open-source software, distributed under the terms of the GNU General Public License (GPL) [4] version 2 or later. Change-log: - A man page has beed added (making up Alessio Treglia's work on debian, thanks). - First attempt to allow a headless application run mode, without GUI or system-tray icon accessibility, with all options given as command line arguments. - Allow the build system to include an user specified LDFLAGS. References: [1] QmidiNet - A MIDI Network Gateway via UDP/IP Multicast http://qmidinet.sourceforge.net [2] multimidicast - sends and receives MIDI from ALSA sequencers over network http://llg.cubic.org/tools/multimidicast [3] ipMIDI - MIDI over Ethernet ports - send MIDI over your LAN http://nerds.de [4] GPL - GNU General Public License http://www.gnu.org/copyleft/gpl.html Cheers && Enjoy -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

10 years, 3 months

FaustLive is released !

by Stéphane Letz

GRAME is happy to announce the official release of FaustLive. FaustLive is an advanced self-contained prototyping environment for the Faust programming language with an ultra-short edit-compile-run cycle. Thanks to its fully embedded compilation chain, FaustLive is simple to install and doesn't require any external compiler, development toolchain or SDK to run. FaustLive is the ideal tool for fast prototyping. Faust programs can be compiled and run on the fly by simple drag and drop. They can even be edited and recompiled while running without sound interruption or Jack disconnection. 1) Dynamic Compilation : On FaustLive’s windows you can drop your Faust code as a file, a string or a url. The code will be dynamically compiled and executed. You can then choose to edit your code. It will be opened in the default editor for .dsp files (FOLLOW THE README TO CONFIGURE FILE ASSOCIATION). The application will be automatically recompiled, every time you save your document. A crossfade is calculated between two relaying applications in a window to avoid brutal sound interruptions. 2) Audio Drivers : Depending on your Operation System, you will have different drivers available: On OSX : Coreaudio, Jack and NetJack On Linux : Jack and NetJack On Windows : Portaudio You can then dynamically switch from one to another in FaustLive’s preferences. 3) Export Your DSP : Exporting your DSP as plugins is easy, thanks to FaustWeb, compilation service. In FaustLive’s export menu, you can find every platform and architecture that Faust can target. As you choose your target, your code is sent to FaustWeb and you receive the requested binary in exchange. 4) Save Snapshots : If you create a configuration you like, you can save it as a Snapshot. The state of FaustLive will be saved (running applications, Jack connections, interface parameters, …). Later on, you will be able to whether : - recall the snapshot : closing any running application to restore the saved state - import the snapshot : adding the saved state to the current state 5) Remote Control Interfaces (only on Linux and OSX for now) : In the Windows Option toolBar, you can open a UDP port for OSC control or a TCP port for HTTP control. Moreover, the HTLM interface can be accessed through a QrCode that you can create from «View QrCode » in the menu « Window ». Download access: http://sourceforge.net/projects/faudiostream/files/ Tutorial video: http://www.youtube.com/watch?v=8ZUD2c5D-PU Sarah Denoux and Stéphane Letz

10 years, 3 months

New MOD Website

by Gianfranco Ceccolini

Hi everybody Still recovering from the LAC2014 trip but already with news, here’s the link to our new website (including english version) www.portalmod.com The video that was shown at the MOD presentation is right in the frontpage. Even better, the plugin library can now be navigated in the same way as in the MODs interface. On top of it, there’s a dashboard section where visitors can try the interface without audio. Hope you all enjoy. Cheers Gianfranco Ceccolini

10 years, 3 months

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Linux-audio-dev