Linux-audio-user February 2014

linux-audio-user@lists.linuxaudio.org

108 participants
83 discussions

[OT] Free Course online about the Higgs Boson

by Carlos sanchiavedraz

Hi dear all. Just wanted to let you know about this amazing course that the University of Edimburg has online during 7 weeks, and there's still days to sign in: https://www.futurelearn.com/courses/higgs As maybe you've notice, I'm quite eclectic and curious about anything, and Science (Physics in this case) is one of my favourite matters, so I'm in the course. It's now in the thick of the 2nd week and I tell you that it is amazing the quality and also the simplicity they've achieved given the complexity of the subjects, with a lot of instructional videos and some articles and texts, and even Mr. Higgs is there himself. Kindest Regards. -- Carlos sanchiavedraz * Musix GNU+Linux http://www.musix.es

10 years, 9 months

Cutting vorbis files and resetting their times?

by Ken Restivo

I have a feeling I've asked this before, but I don't remember if there ever was an answer. I'm trying to do the following: 1) Cut an Ogg Vorbis file into chunks 2) Reset the start time of each chunk back to zero, and have its end time be the end time of the clip from zero. Thing #1 is very easy; oggz-chop does the job well. But thing #2 seems un-possible due to perhaps some design flaw in vorbis? The start times of vorbis files cut up with oggz-chop or similar tools is broken: it shows a start time of whatever was the time of the clip in the original file. This causes certain players (including Airtime) to lose control of their bladder: they either refuse to play the file or play silence for X number of hours until the start time of the clip. Yeah yeah, I know, I could just convert the file to WAV, then re-encode it. But... I do not want to do that. First of all, it reduces the quality. Secondly, there's something just upsetting my OCD nature, about not being able to do this without re-encoding. Any clues? I don't mind writing some C (or whatever) and wading through docs, if I had some expert advice on how to approach the problem (or at least confirmation that it is indeed possible). It's almost like I'd have to have something that reads the blocks one by one, then calculates the new time, and writes the block out with the new time? Is that a sensible way to do it? -ken

10 years, 9 months

Audio and Bluetooth

by Clifford Dunn

Hi List, Since I discovered that there is a great deal of interference happening when I have both wifi and USB audio running, it certainly has been a drastic improvement to turn that off when I'm working. I'm currently building a foot pedal controller. I have an Arduino Diecimila that is going to transmit the simple on/off as well as continuous controller info. My thought is to make it a bluetooth device and have wireless communication with my computer. Since I currently have no other bluetooth devices to test it out, does anyone have any information on how much bluetooth has the potential to interfere with my audio? Is it better to simply keep it as a bluetooth device? Thanks again! Cliff Clifford Dunn Flutist/Composer http://www.myspace.com/clifforddunn http://www.youtube.com/user/beatleboy07 https://www.soundcloud.com/clifford-dunn

10 years, 9 months

Jconvolver: Can't initialise engine.

by F. Silvain

Hey hey, with jconvolver I get exactly that warning: Can't initialise engine. I haven't found any means to get further output. I use jconvolver 0.9.2, just compiled again to make sure, that some updates didn't cause confusion. Compiler is gcc 4.8.2. Any advise is precious. Ta-ta ---- Ffanci * Internet: http://freeshell.de/~silvain

10 years, 9 months

Workshop on Audio Plug-Ins Design in Faust

by Romain Michon

Hi Folks, I'll be giving a workshop on Audio Plug-Ins Design in Faust this summer at the Center for Computer Research in Music and Acoustics (Stanford University, USA) this summer (Mon, 07/07/2014 - Fri, 07/11/2014). More informations are available on this page: https://ccrma.stanford.edu/workshops/faust-workshop-2014 You can also contact me directly if you have specific questions: rmichon(a)ccrma.stanford.edu Hope to see you there! Cheers, -- Romain Michon PhD Candidate Center for Computer Research in Music and Acoustics Stanford Universityhttp://ccrma.stanford.edu/~rmichon

10 years, 9 months

b-step - sequencer linux native vst-plugin

by Aurélien Leblond

Saw that today on twitter b-step - sequencer vst-plugin http://b-step.monoplugs.com/ It comes with a linux native vst. I didn't get the chance to test the demo, but the video sounds nice... Aurélien

10 years, 9 months

Music made with Linux "Naale Lezion - Shivat Zion"

by Moshe Werner

Hi all, this is the first song released from a small live show that I recorded recently. The Band is "Shivat Zion", an Israeli Reggae band. https://www.youtube.com/watch?v=KZS57xoBET4 Everything was done with Linux software. Software I used: Arch Linux Ardour 3 Calf Lv2 effects (several) GxZita_reverb (which I just recently discovered, and what should I say... what a sweeet sounding reverb, new favorite) Also played around with the new meters.lv2 bundle, I think though that I didn't get the full idea of R128 yet. Invada Dynamics processing TAP Everything regarding the Video work was done by my brother Michael. He used KDEnlive to edit the video, also on an Arch machine. Hope you enjoy. Cheers, Moshe

10 years, 9 months

Re: [LAU] progressive time stretch

by Renato

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Fri, 14 Feb 2014 20:32:29 +0100 raf <rmouneyres(a)gmail.com> wrote: > Hello, > > i'd recommend to create a tempo map (vs timestreching which would > lead to artefacts) As you mention recording in ardour, you could use > it to create the tempo map, hi, what is a "tempo map" and how do you create it in ardour? couldn't find anything about it. I don't want to manually enter single tempo changes in ardour meanwhile I'm looking into klick, it seems it should work (though can't get it to sync to jack transport ATM) - but this way the tempo changes will not get recorded into ardour... i.e. every time I press play I should also somehow start klick... renato -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQEcBAEBAgAGBQJS/p9DAAoJEBz6xFdttjrfu/YH/jL8ab4WU/JFEJBXuymG9Ljs Ui7nRuwlhMak+cSwsj8ikmDLNkJbdW0TIfsWJEGcNtJIrpSgGPPWUcIP0RNJ3UFC grcpY8UNROawf6cu7lwcU+3rjDCkepv4BsbR1m4rRTQZawPbzqc4AzeE4AzQMGR0 Whu14iqhA//VO5oD9+Q+KztlxXCtziKlOB0pwegdshwWuby9Y+JABKwwtUg7LMi3 tuu1/XKTbtUXuYoDic/M1Msl3jQuzq8l3Z69Dw2CU8biCeEwsCXT235J7pD3pba8 uc2AHtrA8re6Hgs+3SXs+TzzC7IHbRZGYOmGyxnQm3hTClLWSoDyhXnHoBjALG0= =SXwS -----END PGP SIGNATURE-----

10 years, 9 months

simple LADSPA stereo panner ?

by raf

Hello, i face a terribly simple problem : i can't find any stereo panner ladspa plugin ! by stereo i mean : 2 audio channels inputs, pan control, 2 audio channel outputs can someone confirm there is not any or am i missing something ? Raphaël

10 years, 9 months

Rep: simple LADSPA stereo panner ?

by raf

>> Let me know how these work out for you :) > > here we are, a quick test to say, YES those two plugin perfectly do the job. > Using the balance control is just enough for what i need. > >> >> Plugin Name: "Stereo width" >> Plugin Label: "stereowidth" >> Plugin Unique ID: 1955 >> Maker: "Fons Adriaensen <fons(a)linuxaudio.org>" > > playing with the stereo width can lead to very special results, not exactly what i expected, but interesting for mixing. > I'll take a closer look at the control behavior. > >> Plugin Name: "Stereo balance and panner" >> Plugin Label: "stpanner" >> Plugin Unique ID: 1956 >> Maker: "Fons Adriaensen <fons(a)linuxaudio.org>" > Sure this one is the simplest and effective for a "standard" balance control. Using the L and R control can help if width reduction is needed, and the balance control becomes less brutal Great tools, thanks guys. Raphaël

10 years, 9 months

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Linux-audio-user February 2014