Linux-audio-user April 2015

linux-audio-user@lists.linuxaudio.org

84 participants
67 discussions

Recording a video with High quality audio

by Ivan K

I would like to make a video of a performance of acoustic music. I have a webcam on my computer, but rather than use the microphone that is on the webcam, I would prefer to use my ART USB Dual TubePre microphone preamp plugged into the S/PDIF of my M-Audio 2496. Is there any application that can record video from a webcam but use an audio input other than the built-in mic on the cam? Thanks;

8 years, 5 months

LAC2015 Aftermath: The LAC2014 Percussion Combo Kit now available

by Frank Neumann

[The posting to LAA is awaiting moderator approval for 2 days, so I take the liberty of cross-posting] Hi, during LAC2015 in Mainz last week, I gave a lightning talk on what I called "The LAC2014 Percussion Combo". It was a presentation about a little field recording session conducted one year earlier, during LAC2014 in Karlsruhe, and what I made out of it. The data is now finally online, including the actual sample library kit (individual wav files) with a mapping file for Hydrogen, a tiny demo pattern, and a demo song called "That's LAC" that came to life "out of nowhere" - well, I guess I'll simply call it my first Linux Audio "release" ever :-). Read all about it here: http://linuxaudio.de/wp/?p=158 Thanks go out to the individual artists whose performance I had the honour to record: Marc Groenewegen, Pjotr Lasschuit, Nils Gey, Bernard Tressol, Michael Seeber, Stefano Pedrinazzi, Marie-Kristin Meier, and Fernando Lopez-Lezcano. Enjoy, Frank

8 years, 5 months

Re: [LAU] LAC2015 Aftermath: The LAC2014 Percussion Combo Kit now available (fwd)

by F. Silvain

Hey hey Frank, that was a beautiful demo! My, how I laughed! Just lovely! Thanks! I'll test the kit soon, it sounds like fun. Ta-ta ---- Ffanci * Homepage: https://freeshell.de/~silvain * Twitter: http://twitter.com/ffanci_silvain * GitHub: https://github.com/fsilvain

8 years, 5 months

Three Blog Posts About Ardour 4.0

by Neil

Here is what I have written about Ardour 4 since its release, four days ago. http://oldmixtapes.blogspot.com/2015/04/first-look-at-ardour-40.html http://oldmixtapes.blogspot.com/2015/04/drag-and-drop-file-import-in-ardour… http://oldmixtapes.blogspot.com/2015/04/ardour-4-visual-theming-and.html -- DJ Dual Core's Blog http://oldmixtapes.blogspot.com/ Order without government; Peace without violence.

8 years, 5 months

Clean version of Advanced Gtk+ Sequencer 0.4.2-52

by Joël Krähemann

Hi, Clean version available of Advanced Gtk+ Sequencer: http://gsequencer.org/downloads/ags-0_4_2-52.tar.bz2 A half year later after releasing 0.4.2 its end is fourseeing, for now me should be able to do extensive testing. To compile and run: ./configure make ags ./ags bests Joël Krähemann

8 years, 5 months

Unable to stream audio with Jack

by Luke Benes

I've been struggling for the past week to do the most basic task with Jack NetDriver. I have 3 machines connected over a LAN. The speakers are on an Ubuntu 14.4 box and a Windows box, while the audio source is connected to the line-in of a Windows box. So far it seems like Jack is connecting, but I can't get either box to output any audio. JACK slave (on speaker-PC) Ubuntu: $ jackd -R -d alsa -P -r 48000 -S $ jack_load netadapter -i '-C 2' $ jack_connect netadapter:capture_1 system:playback_1 $ jack_connect netadapter:capture_2 system:playback_2 JACK slave (on speaker-PC) Windows 7: C: jackd.exe -R -S -d net C: jack_load netadapter C: jack_connect netadapter:capture_1 system:playback_1 C: jack_connect netadapter:capture_2 system:playback_2 JACK slave (on speaker-PC) Windows 7: C: jackd.exe -R -S -d portaudio "ASIO::ASIO4ALL v2" C: jack_load netadapter In JackControl connect linein1->slave1 In JackControl connect linein2->slave2 In JackControl press the play button Results neither of my slaves play any audio. And I get error messages like this: **************** Network parameters **************** Name : luke2-win7 Protocol revision : 8 MTU : 1500 Master name : opteron-PC Slave name : luke2-win7 ID : 1 Transport Sync : no Send channels (audio - midi) : 8 - 0 Return channels (audio - midi) : 2 - 0 Sample rate : 48000 frames per second Period size : 1024 frames per period Network latency : 5 cycles SampleEncoder : Float Slave mode : sync **************************************************** Recv connection lost error Driver is restarted MMCSS API not used... JackTimedDriver::Process XRun = 145 usec Restarting driver... NetDriver started in sync mode without Master's transport sync. Waiting for a master... Initializing connection with opteron-PC... **************** Network parameters **************** Name : luke2-win7 Protocol revision : 8 MTU : 1500 Master name : opteron-PC Slave name : luke2-win7 ID : 1 Transport Sync : no Send channels (audio - midi) : 8 - 0 Return channels (audio - midi) : 2 - 0 Sample rate : 48000 frames per second Period size : 1024 frames per period Network latency : 5 cycles SampleEncoder : Float Slave mode : sync **************************************************** Wrong packet type : a NetSlave : missing last data packet ... Wrong packet type : a NetSlave : missing last data packet Wrong packet type : a Can any Pro's help a total beginner out?

8 years, 5 months

Re: [LAU] [LAD] Linux Audio Berlin user group

by Bruno Gola

Nice! May 6th is good :) []'s On Wed, Apr 22, 2015 at 10:07 AM, William Light <wrl(a)illest.net> wrote: > Hey all, > May 6th works out for me too. 8PM sounds good also. > > -w > > On Wed, 22 Apr 2015, at 09:04, David Runge wrote: > > Excellent. > > > > The less mailman to configure for me on Debian-based systems, the better! > > ;) > > May 6th sounds good! Any thoughts on what time? I suppose early evening? > > 8PM okay? > > > > So many new mailing lists with interesting topics as of late! > > > > I just subscribed to the one you mentioned below. > > What are your DNS issues exactly? Zone file/ MX record related? > > Seems okay from the outside (if you host your stuff on gandi > > exclusively): > > > > host -t MX linuxaudio.berlin > > linuxaudio.berlin mail is handled by 50 fb.mail.gandi.net. > > linuxaudio.berlin mail is handled by 10 spool.mail.gandi.net. > > > > See ya soon, hopefully. > > > > Best, > > David > > > > > > On 22.04.2015 00:37, Sam Tuke wrote: > > > Hi All, > > > > > > On 21/04/15 15:07, Bruno Gola wrote: > > >> There were lot's of Berliners at LAC 2015 and after talking to some of > > >> them we thought it would be nice to start a linux audio user group > here > > >> in Berlin. > > > Keen to hear who's interested and agree a date for our first meet :) > > > > > > I've got the domain up and running, will put a more interesting front > > > page on there soon, and also get Mailman ready for the new discuss list > > > (as Bruno mentioned it's setup except for DNS). > > > > > > On 21/04/15 16:54, Nils Gey wrote: > > >> that is very good to hear! On behalf of the "Open Source Audio Meeting > > >> Cologne" I wish you luck. > > > Great to hear from you Nils and thanks for your advice. No chance of > > > keeping it social as I'm a total misanthrope. Not really ;) > > > > > > On 21/04/15 22:10, Harry van Haaren wrote: > > >> I'm visiting berlin from the 4th to the 11th - and being a Linux Audio > > >> head I'd love to meet you all (again) soon :) Of course if that > > >> doesn't suit for any reason, don't worry about it! > > > Brill :) Coming to do some audio-related project? Let's have an LA > beer. > > > > > > On 21/04/15 22:05, David Runge wrote: > > >> I'd be totally up for the Berlin group. > > > Happy to hear it -- will add you to the discussion list momentarily. > > > > > >> Is it possible to create an > > >> additional mailing list on this server? > > > The new list actually already exists can also be subscribed to (here > > > http://linuxaudio.berlin/mailman/listinfo/discuss) but emails sent to > it > > > aren't arriving just yet as I haven't had time to fix the DNS records, > > > as we mentioned. The list and a more useful website than the current > > > holding page will be up and running soon. > > > > > >> C-base would be an awesome place I think! Let us know about what > > >> happens next! > > > I think C-Base is a good bet too (also as I'm a member). > > > > > > If you've read this far and want to come, would Wednesday May 6th work > > > for you? That would mean Harry could attend the first meeting too. > > > > > > Best, > > > > > > Sam. > > > > > > > > > _______________________________________________ > > > Linux-audio-user mailing list > > > Linux-audio-user(a)lists.linuxaudio.org > > > http://lists.linuxaudio.org/listinfo/linux-audio-user > > > > -- > > David Runge > > Köpenicker Straße 163 > > 10997 Berlin > > +491781436915 > > http://www.sleepmap.de > > > > > > _______________________________________________ > > Linux-audio-dev mailing list > > Linux-audio-dev(a)lists.linuxaudio.org > > http://lists.linuxaudio.org/listinfo/linux-audio-dev > > Email had 1 attachment: > > + signature.asc > > 1k (application/pgp-signature) > _______________________________________________ > Linux-audio-dev mailing list > Linux-audio-dev(a)lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-dev > -- Bruno Gola <brunogola(a)gmail.com> http://bgo.la/

8 years, 5 months

GuitarSynth

by Gerald

Hi guys, I've started/hacked a small project called GuitarSynth. It is meant as a playfield for exploring pitchdetection and synthesis for Guitar, since I'm a guitarist. You can get on Github (git clone https://github.com/geraldmwangi/GuitarSynth.git). Its really basic but its fun to play with. It take an audio signal (your guitar) extracts the fundamental pitch and drives some wavetable synths. Feel free to manipulate it, I'll be happy to grant people write access to the repo. Btw on IRC my Nick is JimsonDrift, the name of my band (see www.jimson-drift.de). Cheers Gerald

8 years, 5 months

JACK hangs on openSUSE Tumbleweed

by Jörn Nettingsmeier

Hi *! I've come across a mysterious problem - since a few days ago (openSUSE Tumbleweed is a rolling release), JACK hangs during startup. If you start it with QJackCtl, it will kill it after a while, but if you start it from the console and strace it, you can see it hangs waiting for a futex: [...] sched_get_priority_min(SCHED_FIFO) = 1 sched_get_priority_max(SCHED_FIFO) = 99 mmap(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f9e76cfe000 mprotect(0x7f9e76cfe000, 4096, PROT_NONE) = 0 clone(child_stack=0x7f9e774fdfb0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f9e774fe9d0, tls=0x7f9e774fe700, child_tidptr=0x7f9e774fe9d0) = 4627 sched_setscheduler(4627, SCHED_FIFO, { 1 }) = 0 futex(0x7f9e774fed18, FUTEX_WAKE_PRIVATE, 1) = 1 munmap(0x7f9e7ba87000, 227354) = 0 futex(0x7f9e776ff078, FUTEX_WAKE_PRIVATE, 1) = 1 futex(0x7f9e774fe9d0, FUTEX_WAIT, 4627, NULL) = ? ERESTARTSYS (To be restarted if SA_RESTART is set) --- SIGWINCH {si_signo=SIGWINCH, si_code=SI_KERNEL} --- futex(0x7f9e774fe9d0, FUTEX_WAIT, 4627, NULL and hangs forever after. It seems to be after acquiring SCHED_FIFO, but just to be sure I verified that I'm still in group audio, and we still have @audio - rtprio 95 @audio - memlock 3000000 in /etc/security/limits.conf. The problem started at the same time kernel 3.19.3 came out for Tumbleweed, but downgrading to older kernels in the 3.19 series or as far back as 3.17 doesn't restore jack functionality. So it must be something in userspace. Other people have seen this [1] and solved it with the nuclear option, i.e. downgrading to 13.2, which means a massive userspace rollback. I wonder if someone could offer some advice as to where else to look... I did the usual checkup regarding double installs, and I'm positive my jackd installation is clean. The guys in [1] have used the package, and I've tried both the package and a clean jack1 and jack2 build from scratch, with all other libs cleared by hand and ldd relations checked. Any inspiration welcome, Jörn [1] https://forums.opensuse.org/showthread.php/506613-after-update-Tumbleweed-I… (not a very insightful discussion) -- Jörn Nettingsmeier Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487 Meister für Veranstaltungstechnik (Bühne/Studio) Tonmeister VDT http://stackingdwarves.net

8 years, 5 months

running jackd from rc.local

by Athanasios Silis

Hi all, I am trying to run jackd instance from /etc/rc.local (along with a few other applications) from a custom made init script. The system is ubuntustudio and I have setup everything to have elevated permissions when executing applications from the @audio group. so when I am logged on, I see this: nass@starkill:~$ ulimit -r -l real-time priority (-r) 95 max locked memory (kbytes, -l) unlimited which is expected and I can execute the script I wrote. but, when I execute my script from /etc/rc.local as su - nass -c "ulimits -r -l cd audio_setup/scripts ; bash ./start_audio" then my user does not (yet?) have elevated permissions. real-time priority (-r) 0 max locked memory (kbytes, -l) 64 is there a script I can run before my start_audio script to elevate my permissions? thank you

8 years, 5 months

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Linux-audio-user April 2015