Linux-audio-user June 2014

linux-audio-user@lists.linuxaudio.org

65 participants
50 discussions

[LAU] ardour file name plus "2000"???

by Aaron L.

Whenever I open an older ardour project, it keeps getting renamed with "2000" appended to it. This still happens with the newest release too. What do I need to do to stop this? Thanks.

11 years, 7 months

[LAU] Music made with fun thanx to linux

by Set Hallström

Hi! Recently i traded my earfull portastudio against memories of happy unafortable OSystems some years ago, and then i made this: https://soundcloud.com/sakrecoer/sets/music-made-with-linux I may hope you like it like i do, but i know life is full of inexpectations :) With wishes of happy week endings, -- Set Hallström AKA reSet Sakrecoer http://sakrecoer.com

11 years, 7 months

[LAU] Audio interface latency measurements

by Robert Jonsson

Hello folks, Is there a site/repository somewhere with numbers on audio interface latency? I'm much interested in doing multichannel live audio processing and the device latency matters a lot in this case. I'm especially curious how recent USB audio interfaces provide in this regard. Anyone has any numbers? Lastly, here are some numbers for the firewire interfaces Edirol FA-66 and Presonus FIRESTUDIO Project I measured with jack_delay. FA-66 jackd -Z -t 9999 -d firewire -p 128 -r 44100 -X seq 618.760 frames 14.031 ms jackd -Z -t 9999 -d firewire -p 64 -r 44100 -X seq 420.924 frames 9.545 ms jackd -Z -t 9999 -d firewire -p 128 -r 48000 -X seq 618.780 frames 12.891 ms jackd -Z -t 9999 -d firewire -p 64 -r 48000 -X seq 440.792 frames 9.183 ms jackd -Z -t 9999 -d firewire -p 128 -r 96000 -X seq 724.485 frames 7.547 ms jackd -Z -t 9999 -d firewire -p 64 -r 96000 -X seq 560.492 frames 5.838 ms jackd -Z -t 9999 -d firewire -p 128 -r 192000 -X seq (unstable) 989.556 frames 5.154 ms FIRESTUDIO Project jackd -Z -t 9999 -d firewire -p 128 -r 44100 -X seq 543.411 frames 12.322 ms jackd -Z -t 9999 -d firewire -p 64 -r 44100 -X seq 351.412 frames 7.969 ms jackd -Z -t 9999 -d firewire -p 128 -r 48000 -X seq 543.438 frames 11.322 ms jackd -Z -t 9999 -d firewire -p 64 -r 48000 -X seq 351.438 frames 7.322 ms jackd -Z -t 9999 -d firewire -p 128 -r 96000 -X seq 566.642 frames 5.903 ms jackd -Z -t 9999 -d firewire -p 64 -r 96000 -X seq 374.642 frames 3.903 ms Regards, Robert

11 years, 7 months

[LAU] Streaming radio and calls from listeners

by Louigi Verona

Hey everyone! For more than a year I am producing a skeptic-oriented podcast. So far it's been an offline venture. We have a nice audio mixer from Yamaha that we are recording as one track into Qtractor. However, I am thinking towards live streaming and accepting calls from listeners. Is this realistic with Linux? If yes - can anyone suggest how? -- Louigi Verona http://www.louigiverona.ru/

11 years, 7 months

[LAU] audio recording of my set at LAC 2014 (streaming, download)

by Renick Bell

I'm really glad that I had a chance to perform at LAC this year. Thanks to everyone in the audience! Here's a link to a streaming version on SoundCloud: https://soundcloud.com/renick/live-at-the-linux-audio-conference-2014-karls… If you prefer, here are direct download links in a variety of formats: ogg: http://renickbell.net/sound/renick-bell-live-lac-2014.ogg flac: http://renickbell.net/sound/renick-bell-live-lac-2014.flac mp3: http://renick/renickbell.net/sound/renick-bell-live-lac-2014.mp3 I'll put a video online after I've had a chance to edit it. Best to everyone, Renick -- Renick Bell - http://renickbell.net - http://twitter.com/renick - http://the3rd2nd.com

11 years, 7 months

[LAU] Live bass guitar -> analog synth on a 2007 laptop: viable?

by Artem Vakhitov

Hello fellow Linux audio users, I'm back to dabbling with Linux as an audio system. Among other things, I play bass guitar in a synth pop band and recently started to get interested in bass synthesizers. I could of course buy something like Markbass Super Synth, but then I thought - maybe I could cobble together something using my Samsung Q35 laptop and Linux? The laptop has a dual core processor and 2.5GB RAM. The sound card is a variable here: it could be the built-in Intel HDA (for this particular purpose, why not), or an Infrasonic DeuX (Firewire) that I have, or even some used Echo Indigo (PCMCIA). Is what I want viable at all with a reasonable latency? What software setup can I use for that? Does anybody here use something similar live? Regards, Artem Vakhitov

11 years, 7 months

[LAU] Streaming radio and calls from listeners

by Len Ovens

Louigi Verona wrote: > I am not able to use the telephone line. I can rely only on Skype or > similar online services for calls, unfortunately. I should have > mentioned that, but I did not know someone is using an actual phone for > it nowadays. Ok, I did the full setup minus the last step of encoding and streaming to the server. I used idjc as my console. I installed skype and created an account. My audio setup: ice1712 audio card. At the start of session jackdbus is started at 48k 2048/2, a2jmidid runs and pulse gets restarted so it sees jack. I already have all audio interfaces turned off in pulse so if jackdbus is not available there is only a "dummy" output. I use this: http://www.ovenwerks.net/software/index.html Which I have not yet packaged, and set to phone mode which is jack at 128/2 and pulse->jack bridged and the cpu governor set to performance. My studio mic (I happen to have a Peavy PVM 520NT dynamic set up just now) is into capture_1 through a mackie pre strip. Playback_1 and 2 go to studio monitors. I start idjc and move the pulse lines to the matching idjc voip lines. If I was doing this all the time... ie, this computers job was radio studio, I would have pulse start without connections and use jack.plumbing or some session manager to make sure this are connected right... I haven't looked into it but I think idjc can do this part too. I haven't made actual phone calls, but the "echo/sound test service" provides both incoming and outgoing audio, so I used that as it streamed audio to and from the skype server. The output was recorded rather than streamed. The recording of both incoming and outgoing audio was clear and dropout free. I had an mp3 being played through idjc as well at the same time and that was mixed in fine too. So if pulse is already running on your system, it is probably the easiest thing to use. It just works with pulse with no fussing needed. Using pulse means that the ports are always graphed and can remain connected all the time and any other desktop audio source can easily be used... for example a soundcloud track could be directly played from a browser or another voip client could be used for normal phone calls all without doing any extra setup. Pulse has it's bad points for sure, but with a suitable machine (I have a newer i5 machine at 3.2 Ghz with 8Gram... nothing special) it is the cat's meow for this application. Things to remember: Streaming audio means DSP work. Generally all your content is encoded and the idea of decoding to live play of at least three mp3/ogg files while still encoding the output for streaming is a reality. Then adding skype adds an encoding and a decoding step as well. This is assuming that the "on air talent" (dj) is playing music and talking to their next "on the phone" guest at the same time even if the phone audio is not being streamed at that time. This is where my old computer failed, it just ran out of CPU to do all that. This decoding includes sample rate changes too. I think skype likes 48k and then a lot of mp3 and oggs are 44.1k... though of coarse an effort could be made to make sure the file library is at the working sample rate which may reduce the cpu load some. I didn't have to do that in my test though. On this machine with an mp3 playing and a skype call running my cpu was still less than 10% so there is still room for some audio optimization of the final stream before output. (is there an LV2 plugin for on air optimization? In any case all the bits are there) I suspect there is also room for an on air monitor running separately. -- Len Ovens www.ovenwerks.net

11 years, 7 months

[LAU] 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.

11 years, 7 months

[LAU] Yet another "io GNU/Linux" iso released

by Manu Kebab

Hi, A new 64bit iso is up ;) io GNU/Linux is a Live DVD/USB based on Debian Sid and focused on multimedia. Kernel 3.14.4, Jack2 as default sound server, e18 as desktop environment and a big collection of installed software... Full persistence for USB install (with encryption) and more cool stuff... A great nomade studio :) For more infos: manual, packages list, screenshots, video etc... Check: -> http://manu.kebab.free.fr/iognulinux.html -> https://sourceforge.net/projects/io-gnu-linux/ Feedbacks welcome, enjoy :) MK

11 years, 7 months

[LAU] New EP - Everywhere Nowhere - indie rock

by Nicola

Hi all, The EP of my band is out now! It's been produced using Free and Open Source Software, Debian GNU/Linux + Tango Studio Repositories and Ardour 3. The license is CC BY-NC-SA Feel free to listen and download it freely from soundcloud https://soundcloud.com/bandage-indie-rock/sets/bandage-everywhere-nowhere or Jamendo: http://www.jamendo.com/en/list/a135179/everywhere-nowhere There's also a FLAC version available from Bandcamp http://bandage-indierock.bandcamp.com/album/everywhere-nowhere at 1 euro. Opinions or suggestions are welcome! Thanks Linuxaudio community! Regards, Nicola

11 years, 7 months

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Linux-audio-user June 2014