Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

3 participants
7535 discussions

by Jeremy Jongepier

Dear all, We just enabled all mail services for linuxaudio.org again. All mailing lists are working again and mail can be sent and received for the linuxaudio.org domain. A short recap of what happened is that linuxaudio.org got compromised on January 29th, probably with a compromised private SSH key or password from an account with shell access. The attacker checked the kernel, saw that it was vulnerable to Dirty COW¹, pulled in an exploit and got root. This was quickly discovered by the IT department of Virginia Tech University that disconnected the server from the internet and started a forensic investigation procedure. As part of their IT security policy the server had to be reinstalled and everything had to be set up from scratch again. In the meanwhile I built an alternative setup and after some discussion we agreed on moving linuxaudio.org away from the Virginia Tech server. So linuxaudio.org got a new home after 15 years at Virginia Tech². We're very, very thankful that we could host linuxaudio.org on their servers and we can't stress enough how grateful we are for all the work that has been done on the side of Virginia Tech after the hack. linuxaudio.org now lives at Fuga³, a fully open source OpenStack⁴ cloud based in The Netherlands. Fuga is part of Cyso⁵, the company I work for. The linuxaudio.org ecosystem now consists of three separate servers, a web server, a mail server and a storage server. We rebuilt everything with portability and scalability in mind with a strong focus on security. You can never prevent passwords or SSH keys getting into the hands of hackers but we'll try to keep the servers as up to date as we can to narrow down the attack surface as much as possible. A big thank you to all those who helped out! It was quite a ride but it seems as if most part of the linuxaudio.org ecosystem is accessible again. If you find any web pages, downloads or other bits and parts that don't work properly then please let us know so we can take a look at it. Many thanks in advance and also many thanks for bearing with us! Best, Jeremy Jongepier root(a)linuxaudio.org ¹ https://dirtycow.ninja/ ² https://icat.vt.edu/ ³ https://fuga.cloud/ ⁴ https://www.openstack.org/ ⁴ https://cyso.com/en/

7 years, 11 months

[LAD] LAC 2018: 2nd Call for Papers / Works

by David Runge

[Apologies for cross-postings] [Please distribute] LAC 2018: 2nd Call for Papers / Works Conference date: 7th - 10th June 2018 The Linux Audio Conference 2018 will be hosted at c-base, Berlin - in partnership with the Electronic Music Studio (TU Berlin) and Spektrum: https://lac.linuxaudio.org/2018 -------------------------------------------------------------------------------- The deadline for all submissions has been extended: March 15th, 2018 (23:59 UTC) -------------------------------------------------------------------------------- Submissions may include: - Papers - Posters - Workshops - Music Performances - Multimedia Installations For more details see the CFP on the website: https://lac.linuxaudio.org/2018/pages/cfp/ Looking forward to seeing you in Berlin! The Linux Audio Conference 2018 team

7 years, 12 months

[LAD] PipeWire, and "a more generic seeking and timing framework"

by Jonathan Brickman

Not really sure the subgraph is so good -- one of the things JACK gives us is the extremely solid knowledge of what it just did, is doing now, and will do next period. If I run Pulse with JACK, it's JACK controlling the hardware and Pulse feeding into it, not the other way around, because Pulse is not tightly synchronized, whereas JACK is. But if you can make it work as well, more power to you. Concerning seeking and timing, though, I have had to wonder. My impression of JACK for a long time (and more learned ladies and gentlemen, please correct) is that it uses a basically round-robin approach to its clients, with variation. I have had to wonder, especially given my need for this <https://github.com/ponderworthy/MultiJACK>, how practical a model might be possible, using preemptive multitasking or even Ethernet-style collision avoidance through entropic data, at current CPU speeds. It's chopped into frames, right? Couldn't audio and MIDI data be mapped into networking frames and then thrown around using the kernel networking stack? The timestamps are there...the connectivity is there...have to do interesting translations... :-) Could be done at the IP level or even lower I would think. The lower you go, the more power you get, because you're closer to the kernel at every step. -- *Jonathan E. Brickman jeb(a)ponderworthy.com <http://login.jsp/?at=02e47df3-a9af-4cd9-b951-1a06d255b48f&mailto=jeb@ponder…> (785)233-9977* *Hear us at http://ponderworthy.com <http://ponderworthy.com> -- CDs and MP3s now available! <http://ponderworthy.com/ad-astra/ad-astra.html>* *Music of compassion; fire, and life!!!*

7 years, 12 months

[LAD] CALL - Reminder + Extended Deadline - Thresholds of the Algorithmic - ALMAT @ BEK

by IOhannes m zmoelnig

Call for Applications: Workshop-in-Exposition: Thresholds of the Algorithmic Bergen (NO), June 2018. **Reminder and extended deadline: 23 February 2018** (sorry for x-posting -- please distribute) Algorithms have been used in music and sound art even before the emergence of “computer music” in the 1950s, but today we witness an entire new wave of interest, reflected in festivals, genres, publications and research projects. It is the very notion of algorithms that is shifting. They are no longer an abstract formalisation, but emerge from artistic praxis and experimentation and become entangled in it. Almat and BEK are happy to announce a call for participation in a workshop-in-exposition taking place in Bergen, Norway, June 2018. This will be a part of BEK and Notam’s ongoing series of workshops for advanced users. It is a hybrid format that places the workshop inside an exhibition context, where the exposed works and artefacts form the basis of the workshop’s activity. Instead of “closed works”, what is exposed to the general public are objects, sounds or installations that are open to engagement and reconfiguration during the workshop. Algorithms that Matter (Almat) is an artistic research project funded by the Austrian Science Fund FWF, PEEK AR 403-GBL, and based at the Institute of Electronic Music and Acoustics (IEM) in Graz, Austria. BEK and Notam are centers for innovation and use of technology in music and the arts in Norway. Both Notam and BEK have a strong focus on education, and strive to establish new goals and provide new impulses for current music technologists and artists. - https://almat.iem.at - http://www.bek.no - http://www.notam02.no - Full text of the call: https://almat.iem.at/assets/downloads/almat-bek_call2018.pdf - Application form: https://almat.iem.at/assets/downloads/almat-bek_form2018.pdf ## Theme and Format Thresholds are locations of transitions, points where one modality becomes another, where a qualitative change occurs. In physics the point where an aggregate state changes—the phase transition—is a distinguished transitional location were the properties of the adjacent states become evident. Similarly, in this workshop-in-exposition we want to study the properties of the algorithmic by putting ourselves in threshold positions and actively shape them. More than merely separating two sides, one can spend time on a threshold, move along a ridge, performing a tightrope walk while trying not to fall to either side. Situated within the Almat artistic research project, this event aims at bringing together practitioners and researchers in the field of digital art, sound art and computational aesthetics. The hybrid format of workshop-in-exposition puts on display works of the participants pertaining to the theme, and at the same time avails them for interrogation, discussion and reconfiguration during the week long workshop. The full call embeds a list of three different ‘thresholds’ from which the applicants should point out a specific one, that they recognise as being addressed by their own artistic work. This will act both as a point for further exploration during the workshop and as a bridge towards audience perception. ## Application Please read carefully the call and fill out the form provided at https://almat.iem.at/call2018.html and send it to almat(a)iem.at along with the required accompanying documents. We aim at a balance of gender and background of the applicants. Conditions: - Duration of exhibition: from 08 June to 17 June 2018 - Start date (in situ): 04 June 2018 (preparation and set up from 04 June to 08 June 2018) - End date: 17 June 2018 - Applicants must be present during the workshop. - Workshop fee must be paid by confirmed participants (see form) **Application deadline: 23 February 2018** (e-mail reception, 24:00 CET) If you have further questions, please do not hesitate to contact us at almat(a)iem.at. --- iem.at | kug.ac.at | bek.no | notam02.no | fwf.ac.at

7 years, 12 months

[LAD] test

by Benny Alexandar

Do I need to send test email ? -ben

7 years, 12 months

[LAD] LAD - 2nd test after 29/1...

by Rui Nuno Capela

LAD < 2nd test after 29/1... please ignore -- rncbc aka. Rui Nuno Capela rncbc(a)rncbc.org

7 years, 12 months

[LAD] Best way to connect ALSA MIDI ports programmatically in Python?

by Jonathan E. Brickman

I need to connect ALSA MIDI programmatically, and will prefer to use Python. I perused a number of libraries, did not find an obvious great or best. Recommends? -- Jonathan E. Brickman jeb(a)ponderworthy.com (785)233-9977 Hear us at http://ponderworthy.comcom -- CDs and MP3 now available! Music of compassion; fire, and life!!!

8 years

[LAD] [Almat] CALL - Workshop-in-Exposition: Thresholds of the Algorithmic - ALMAT @ BEK

by IOhannes m zmölnig

Call for Applications: Workshop-in-Exposition: Thresholds of the Algorithmic Bergen (NO), June 2018. (sorry for x-posting -- please distribute) Algorithms have been used in music and sound art even before the emergence of “computer music” in the 1950s, but today we witness an entire new wave of interest, reflected in festivals, genres, publications and research projects. It is the very notion of algorithms that is shifting. They are no longer an abstract formalisation, but emerge from artistic praxis and experimentation and become entangled in it. Almat and BEK are happy to announce a call for participation in a workshop-in-exposition taking place in Bergen, Norway, June 2018. This will be a part of BEK and Notam’s ongoing series of workshops for advanced users. It is a hybrid format that places the workshop inside an exhibition context, where the exposed works and artefacts form the basis of the workshop’s activity. Instead of “closed works”, what is exposed to the general public are objects, sounds or installations that are open to engagement and reconfiguration during the workshop. Algorithms that Matter (Almat) is an artistic research project funded by the Austrian Science Fund FWF, PEEK AR 403-GBL, and based at the Institute of Electronic Music and Acoustics (IEM) in Graz, Austria. BEK and Notam are centers for innovation and use of technology in music and the arts in Norway. Both Notam and BEK have a strong focus on education, and strive to establish new goals and provide new impulses for current music technologists and artists. - https://almat.iem.at - http://www.bek.no - http://www.notam02.no - Full text of the call: https://almat.iem.at/assets/downloads/almat-bek_call2018.pdf - Application form: https://almat.iem.at/assets/downloads/almat-bek_form2018.pdf ## Theme and Format Thresholds are locations of transitions, points where one modality becomes another, where a qualitative change occurs. In physics the point where an aggregate state changes—the phase transition—is a distinguished transitional location were the properties of the adjacent states become evident. Similarly, in this workshop-in-exposition we want to study the properties of the algorithmic by putting ourselves in threshold positions and actively shape them. More than merely separating two sides, one can spend time on a threshold, move along a ridge, performing a tightrope walk while trying not to fall to either side. Situated within the Almat artistic research project, this event aims at bringing together practitioners and researchers in the field of digital art, sound art and computational aesthetics. The hybrid format of workshop-in-exposition puts on display works of the participants pertaining to the theme, and at the same time avails them for interrogation, discussion and reconfiguration during the week long workshop. The full call embeds a list of three different ‘thresholds’ from which the applicants should point out a specific one, that they recognise as being addressed by their own artistic work. This will act both as a point for further exploration during the workshop and as a bridge towards audience perception. ## Application Please read carefully the call and fill out the form provided at https://almat.iem.at/call2018.html and send it to almat(a)iem.at along with the required accompanying documents. We aim at a balance of gender and background of the applicants. Conditions: - Duration of exhibition: from 08 June to 17 June 2018 - Start date (in situ): 04 June 2018 (preparation and set up from 04 June to 08 June 2018) - End date: 17 June 2018 - Applicants must be present during the workshop. - Workshop fee must be paid by confirmed participants (see form) **Application deadline: 16 February 2018** (e-mail reception, 24:00 CET) If you have further questions, please do not hesitate to contact us at almat(a)iem.at. iem.at | kug.ac.at | bek.no | notam02.no | fwf.ac.at

8 years

[LAD] Synchronizig arg update in callback and process in main function

by Benny Alexandar

Hi, I have registered process callback and also a pointer to data struct as arg parameter. Whenever callback happens this arg is typecasted to data struct, and update the data struct. For eg every 20ms process callback happens and updated the data struct arg, and every 100ms main function reads the data struct. While reading and processing the data process callback can happen and update it. How to make sure when main function is reading data struct the process callback is not updated, or any other ways to synchronize these two ? Any example app for this. -ben

8 years, 1 month

[LAD] Jackd & Real Time Kernel

by Benny Alexandar

Hi, I'm using ubuntu PC runs on Intel Core i7, 16 GB RAM. I downloaded the latest JACK audio server tarball and built successfully, and started using it. My requirement is to analyze input audio from line-in and do some processing and send to output. I just compiled simple_client.c and things starts to work. My doubt is do I need to install linux real-time kerel update for JACK. How do I know if jack is running real time, is it by checking for xruns ? -ben

8 years, 1 month

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Linux-audio-dev