Linux-audio-dev

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7535 discussions

[LAD] JackSharp and NAudio.Jack 0.1.0 released

by Thomas Mayer

Hello there, I have just released JackSharp and NAudio.Jack 0.1.0. JackSharp is a C# wrapper around the Jack API for .NET and Mono. NAudio.Jack is a pair of implementations of IWavePlayer and IWaveIn to use JackSharp with the .NET audio framework NAudio. I have tested it on Windows 8.1 and Debian sid (i386 and amd64). These are available on NuGet: https://www.nuget.org/packages/JackSharp/ https://www.nuget.org/packages/Naudio.Jack/ Development is done on Github: https://github.com/residuum/JackSharp Best regards, Thomas -- "Ich komme aus dem Staunen nicht heraus." "Dann bleib halt drin, du Seppel" (Dietmar Dath - Die Abschaffung der Arten) http://www.residuum.org/

9 years, 11 months

[LAD] 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, 11 months

[LAD] [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

9 years, 11 months

[LAD] .NET/Mono bindings for libjack

by Thomas Mayer

Hello, I have started developing JackSharp, a .NET/Mono binding for libjack. It has been tested on Windows 8.1 and Debian GNU/Linux sid amd64 and i386, but should work on other platforms as well. https://github.com/residuum/JackSharp Not every API call is implemented yet, especially the transport API has not been used, currently there are two main client classes: Client: Use this to create a client with audio and MIDI ports and add a function to the process event. Controller: class for managing port connections. If you want to build a replacement for QJackCtl et al, then use this. This repository also contains a wrapper for NAudio. Of course, this has not been tested or used in real software, so this is still pre-alpha. And I am willing to change the API, as well as take pull requests. Thanks for looking into the code and using it, Thomas -- "When one's home has a really excellent computer capable of reaching other computers anywhere in the Galaxy, one scarcely needs to budge." (Janov Pelorat in: Isaac Asimov - Foundation's Edge) http://www.residuum.org/

9 years, 12 months

[LAD] Looking for speakers and demonstrations for the "Open Source Audio Meeting Cologne" (monthly community meeting)

by Nils Gey

Dear developers and users, the "Open Source Audio Meeting Cologne" takes places monthly since June 2014 in Cologne, Germany. It is a community meeting: linux and open source audio enthusiasts, user, musicians and developers connect, share, discuss and help each other. But the meeting is also a monthly "mini linux audio conference". While not really a formal conference we have talks and demonstrations each time that deal with musical, technical or scientific aspects of everything music and audio with free and open source software and hardware. Regular attendance is close to 10 people for regular meetings and more for special meetings, for example when we have invited speakers and "guest-stars". I would like any of you to be such an invited star. If you are in the area (or willing to make a trip) it would be fantastic to have you here and give us a talk or demonstration about YOUR topic. Be it your music, your software or anything that you work with or on. You can answer me in private or publicly, your choice. If you are interested here is some more condensed information: -The time frame for a talk or demo is from 30 minutes to 2 hours for such an event. -Dates for 2016 (all Wednesdays, all 7pm): March 16th, April 20th, Mai 18th, June 15th, July 20th, August 17th, September 21st, October 19th, November 16th -The language can be English or German -The place is Heliostrasse 6a, 50825 Cologne Germany and has very good public transportation nearby and is therefore easy to get to. -While we have no money to offer you can get a place to sleep for the night and food. -We provide the option to record your talk on video and upload it (or simply send it to you, if you prefer) Website: http://cologne.linuxaudio.org It would be fantastic to hear from you! Yours, Nils Gey

9 years, 12 months

[LAD] sending atoms to LV2 plugin with LVTK

by Igor Angst

Hi, I'm new to audio programming, and new to LV2 and LVTK. I managed to build the LVTK examples from sources. Now I'm trying to figure out how I can send a simple text message from my UI to the plugin (it will be used for speech synthesis). First question: In the ttl, can I just add an atomPort with a type other than sequence, like this: [ a atom:AtomPort , lv2:InputPort ; lv2:index 3; lv2:symbol "text"; lv2:name "Text"; atom:bufferType atom:String ; ] Second question: How do I send a string over this port? I suppose I need to wrap it into an LV2_Atom_String somehow. However, I always end up receiving MIDI data in my plugin. Third question: In a Synth plugin, how do I handle events other than MIDI note on and off (which have both their own specialized methods)? Which method should I overwrite to react on the strings coming in over my atomPort? Any pointer to a solution would be nice! Best wishes, Ulrich

10 years

[LAD] cpu spikes

by Fokke de Jong

Hi all, This is my first post here. I’m note new to audio programming or linux, but I haven’t done much in terms of combining the two. Most of my audio programming has been on os x. Currently working on some realtime convolution with lots of channels and low latency requirements, but I am running into some unexpected cpu-spikes and hope some of you might have an idea of possible causes. I’m processing 32 sample-blocks at 48KHz but roughly every 0,6 seconds I get a large spike in cpu usage. This cannot possibly be explained by my algorithm, because the load should be pretty stable. I am measuring cpu load by getting the time with clock_gettime(CLOCK_MONOTONIC_RAW, timespec*) at the beginning and end of each callback. When converted to a percentage my cpu load hovers somewhere between 40 an 50% most of the time, but more or less every 900 callbacks (0.8 seconds there is a spike of more than 100%. I am not doing any IO, mallocing or anything else that could block. My threads are SCHED_FIFO with max priority (I have 4 threads on 4 cores). The only explanation I can come up with is that my threads are somehow pre-empted even though there are realtime threads. Is that even possible? And is there a way to check this? Besides pre-emption maybe my caches are severely thrashed but i find that unlikely as it seems to happen on all 4 cores simultaneously. I’m running (more or less default install, no additional services run-in) Linux Mint 17.3 with a 3.19.0-42-lowlatency kernel on a core i7-6700 with hyperthreading/turbo disabled. I remember reading somewhere that realtime threads cannot run more than .95s every second. That would be very bad if it actually meant my threads are blocked run for a period of 50ms straight… Anyone have any thoughts on possible causes? best, Fokke

10 years

[LAD] GSequencer v0.7.3

by Joël Krähemann

hi all linux audio devs Advanced Gtk+ Sequencer libraries go to version 0.7.3. http://gsequencer.org/download.html Although the API is still unstable you might get insights, yet. http://gsequencer.org/api/ags/index.html * rudimentary JACK support * refactored AgsTurtle to interface with RDF triples * some API enhancements Bests, Joël

10 years

[LAD] RME madi latency

by Fokke de Jong

Hi all, I have a RME madi fx card, but i found out that the minimal buffersize for those cards is 8192 samples, which is way to big for my use. So i am thinking of returning the card, and getting the ‘normal’ rme madi (without the fx). As that seems to have a more sensible minimal buffersize of 128 (or so i am informed). I wonder if anyone here that owns a RME madi ( or has access to) ever did a real world round trip latency test on it? Of course it depends on the converters as well, but it would be great to have some numbers anyway. cheers, Fokke

10 years

[LAD] 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

10 years

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