Linux-audio-dev January 2007

linux-audio-dev@lists.linuxaudio.org

68 participants
48 discussions

Fwd: [linux-audio-dev] Sound processing objects architecture, is it possible?

by Steve Harris

On 22 Jan 2007, at 22:15, Stefano D'Angelo wrote: > 2007/1/22, Dmitry Baikov <dsbaikov(a)gmail.com>: >> On 1/23/07, Stefano D'Angelo <zanga.mail(a)gmail.com> wrote: >> > Good point! This is true, but there are lots of sound processing >> > plugins around, so maybe instead of creating a new API and then >> apply >> > some "compatibility layer", it should be better to create a >> wrapping >> > tool natively. I think it should be also easier to expand. >> >> Then, embrase LV2 and create LV2 plugins that will load VSTs, LADSPA >> and anything you want. >> Or if you want something not possible with LV2, write an extension >> proposal. >> >> I think LV2 was designed as a very extendable API. >> If it is not, in your opinion, then help the guys to improve it. > > That could be a very wise solution, but there's one big problem with > it: when you load a LV2 plugin, you load only one plugin! > To be clearer I make an example: I have 10 VST plugin, and I want to > write a LV2 plugin which loads VST plugins. When the LV2-aware > application asks me which plugin I want to load I should specify the > VST plugin loader... but then? There's no way for my LV2 plugin to > determine which VST plugin it should load. This works fine, and was in the design brief for LV2. When asked what effects your LV2 plugin supports, you can return a list. > But also if this is an overcomeable problem, for each VST plugin I > load I have to waste memory space with a new instance of the LV2 VST > loader plugin. No you don't. A LV2 VST loader would be a single shared object, so the OS would only load one instance of it. > Then, it is quite absurde from the user point of view to open a plugin > which lets you open other plugins... it's just illogical! It doesn't look like that to the user, they will just see a list of plugins, some of which will be VST and some will not be. Have you tried the DSSI VST reflector? It would work the same as that. > Don't misunderstand me, LV2 is great, I think that it's the best > processing architecture out there, but it's designed with a 1:1 > relationship in mind (one plugin = one effect). That's absolutely not > an LV2 weakness, it just does its job and nothing else (as it should > be). You need to read the spec again. The terminology is confused, not least in the spec documents, but a single .lv2 "plugin" can host multiple effects with different ports and so on. - Steve

17 years, 8 months

[linux-audio-dev] interview with Rui Nuno Capela

by Dave Phillips

Greetings: I've placed online an interview with Rui Capela, the creator of QJackCtl, QSynth, QSampler, and QTractor. You can read it here: http://www.linuxjournal.com Enjoy! Best, dp

17 years, 8 months

[linux-audio-dev] Back in the land of the connected

by Steve Harris

Just a quick heads-up. As some of you may know, I recently left my old job and the University of Southampton. But, I forgot to fill in the paperwork to keep my old accounts, machines etc. Consequently my @ecs.soton.ac.uk and @plugin.org.uk addresses stopped working, and the server that was running plugin.org.uk went offline. I now have my email accounts back. I'm still fishing through the backlog, so if you sent anything and I haven't replied, give it a week or so then try again. Some stuff will have been lost. Plugin.org.uk is back online at a new server, but judging by my inbox some things aren't working right. I'll look at it over the next day or so. - Steve

17 years, 8 months

[linux-audio-dev] Little advertisment ;P

by kind king knight

I am an electronic musician (even an computer musician). I am specializen in any kind of electronic music from techno to glitch .Here are some of my releases: www.ccmixter.org/media/people/game_core I am also a regular participator of soundevotion (www.sdcompo.com)tracking competition (as crosfire) I mainly use trackers (renoise,fasttracker, sakale), but have experience in modular synthesis (reaktor, buzz, arts builder), midi/audio/vst sequencers (cubase, logic), and other (rebirth, reason, and many others). The point is that if you have developed an music application (linux, or windows), and need demo songs, or a simple testing, then I am probably interested:). I know that most of open source audio developers are also musicians, and they do the demo songs, and bug testing, and other things by themselves, but there not always is time. Anyway I am here to help you! :D

17 years, 8 months

Re: [Consortium] Re: [linux-audio-user] Re: [linux-audio-dev] LAD/LAU/LAA/Consortium/...

by Marc-Olivier Barre

On 1/19/07, Leonard Ritter <contact(a)leonard-ritter.com> wrote: > i don't see why we need to "move" to forums. mailing lists and forums > have a different target audience and purpose. > > however i strongly support a linux audio related forum - especially for > people new to the subject or searching for help (right now they turn up > on irc in order to make fools out of themselves), an aggregation of > knowledge in form of organizable threads that can be browsed wouldn't be > such a terrible idea. > > "we need one because others have one" is a stupid argument. there are > far better arguments for a forum. > > i think all that is needed is someone with some (security related) > experience with forums and enough time to set it up and moderate - i am > convinced ico or whoever is responsible for la.org will happily provide > resources for such an experiment. Ok, Apparently forum addicts have decided to hijack this thread though, the original question was : do you want LA* _lists_ (LIST is the keyword here, can't stress it enough) to be moved to linuxaudio.org. I have noting against the idea of a forum, the people interested in this are free to build and maintain one and eventually discuss it with Ico. I'm sure __________________ Marc-Olivier Barre, Markinoko.

17 years, 8 months

Re: [Consortium] Re: [linux-audio-user] Re: [linux-audio-dev] LAD/LAU/LAA/Consortium/...

by Marc-Olivier Barre

On 1/19/07, Mark Knecht <markknecht(a)gmail.com> wrote: > > By the way - one negative thing about email lists is that my response > will not be seen by everyone who saw what I'm replying to since I'm > not subscribed to all the lists on this email. > Wrong, if a non member posts on the list, it's my job to review the message and accept it if it's not spam and for LAA if and only if it's an announcement. __________________ Marc-Olivier Barre, Markinoko.

17 years, 8 months

Re: [linux-audio-dev] an relevant link about Vista

by Kjetil S. Matheussen

Wayne Myers: > > I'm not a fan of Microsoft either, but I do not believe there is any > place for your extremely contentious political opinions with regard to > the Middle East on this list. At all. > > You are of course entirely free to express those opinions, but you might > try choosing a forum where they are in some way relevant to discussion, > or, indeed, wanted. > Although I generally agree with you about choosing a more relevant forum, you should know that what you just wrote can be seen as just as much an extreme political opinion as well, and that you, by what you wrote, continue to nurture a potentional flame war. I don't know whether it was intentional or not.

17 years, 8 months

[linux-audio-dev] LAD/LAU/LAA/Consortium/...

by Predrag Viceic

Hi, Sorry for crossposting, which is intentional. See below ;) I personally think that this multiplication of LA lists is not a good thing. The idea, proposed by Ivica, which politely suggests the migration of all those lists to an unique one seems very good to me. I would even suggest the usage of a forum (à la php-forum) for information sharing. Those forums would allow multiple topics (LAD, LAA, LAU, Ardour, Rosegarden, MuSE, Jack, ... ) and in the same time facilitate the research, the tracking of topics and the most important thing, would allow the linux newcomers to see all the work done in those lists. I hope that I'm not irritating anyone by suggesting the above, but we are all conscious of the fact that linux audio is still a niche "market" so having an unique point of access to the posts would really be awesome. Cheers, Predrag Viceic http://freecycle.redsteamrecords.com

17 years, 8 months

Re: [linux-audio-dev] Recommended books for new audio developers

by apolinaire＠poczta.fm

Let me introduce a little (IMHO) listing of readings :) Generallly, Theory of Electronic Music created by Computer: The Theory and Technique of Electronic Music (Online Book) http://crca.ucsd.edu/~msp/techniques.htm by Miller Puckette (current version is "v0.11") Electronic and computer music by MANNING Peter (2004) http://books.google.com/books? vid=ISBN0195144848&id=P2dClS4LdPQC&pg=PP1&lpg=PP1&dq=Electronic+and +computer+music Additional Resources: Musik- und Audioinformatik (course) http://www.encyclospace.org/Musikinformatik_1/ by Prof. Dr. Guerino Mazzola ___________________________________________________________ Acoustics, etc. Master Handbook of Acoustics by F. Alton (2000 - 592 pages) http://books.google.com/books?q=everest+acoustics&btnG=Search +Books&as_brr=0 The Science of Sound by Thomas D. Rossing, F. Richard Moore, Paul A. Wheeler Addison Wesley (2002) ___________________________________________________________ Perception, Cognition Music, Cognition, and ComputerizedSound by Perry R. Cook (1999 - 392 pages) http://books.google.com/books? vid=ISBN0262531909&id=L04W8ADtpQ4C&pg=PP1&lpg=PP1&ots=7fqmDaKOy5&dq=music,+cognition,+and+computerized+sound&sig=yKMxGVK7hx2MY0Bt3d2o6IAB4l0 Spatial Hearing: The Psychophysics of Human Sound Localization by Jens Blauert (1997 - 494 pages) http://books.google.com/books? vid=ISBN0262024136&id=wBiEKPhw7r0C&pg=PP1&lpg=PP1&ots=4Grc8V9Sfj&dq=spatial+hearing&sig=gn-DAIIkAIpsR4bATxe9SYc5uCc Additional Resources: http://www.cnmat.berkeley.edu/Music108/index.html ___________________________________________________________ Digital audio signal Principles of Digital Audio by Ken C. Pohlmann (2005 - 842 pages) The Art of Digital Audio by John Watkinson (1994 - 685 pages) ___________________________________________________________ Audio Signal Processing The Scientist and Engineer's Guide to Digital Signal Processing http://www.dspguide.com/ (Online Book) by Steven W. Smith Digital Audio Signal Processing by Udo Zolzer http://books.google.com/books?vid=ISBN0471972266&id=IPMhDE- QWzQC&pg=PP1&lpg=PP1&ots=RgnzD-LNaH&dq=Digital+Audio+Signal +Processing&sig=yHPLV6fpUnuIBOuW1BvePBiHaLc DAFX - Digital Audio Effects by direction Udo Zolzer http://books.google.com/books? vid=ISBN0471490784&id=h90HIV0uwVsC&pg=RA1-PA2&lpg=RA1-PA2&ots=dhzgTFs4d- &dq=audio+digital+signal+processing&sig=amsRRLktD8AfWJ97vCiMuLe4Pw8 Introduction to digital filters. (Online Book) http://ccrma.stanford.edu/~jos/filters/ by Julius O. Smith Physical Audio Signal Processing: For Virtual Musical Instruments and Audio Effects (Online Book) http://ccrma.stanford.edu/~jos/pasp/ by Julius O. Smith additional resources: http://www.bdti.com/faq/ http://www.bdti.com/articles/info_articles.htm __________________________________________________________ Audio Programming Resources http://www.harmony-central.com/Computer/Programming/ http://www.audiomulch.com/~rossb/code/music-programming/ Linux Audio Conference papers etc. 2003 http://on1.zkm.de/zkm/stories/storyReader$3027 2004 http://on1.zkm.de/zkm/stories/storyReader$3623 2005 http://lac.zkm.de/2005/ 2006 http://lac.zkm.de/2006/ __________________________________________________________ Sound Recording Sound Recording: The Life Story of a Technology by David L. Morton (2006 - 215 pages) The Art of Recording: Understanding and Crafting the Mix by William Moylan (2002 - 304 pages) The Mastering Engineer's Handbook by Bobby Owsinski, Sally Englefried (2000 - 270 pages) Mastering Audio: The Art and the Science by Bob Katz, Robert A. Katz (2002 - 319 pages) additional resources: Foundations of Sound Recording Technology http://ccrma.stanford.edu/courses/192a/ Foundations of Sound Recording Technology http://ccrma.stanford.edu/courses/192b/ >Computer Music Tutorial > by Curtis Roads (1995, 1254 pages) >Computer Music: Synthesis, Composition, and Performance > by Charles Dodge and Thomas Jerse (1997, 480 pages) > I hope you will add something:) ----------- Pawel Cyrta -- pawel.cyrta(a)ircam.fr ------- l'Equipe Analyse/Synthese IRCAM 1 place Stravinsky 75004 Paris FRANCE ---------------------------------------------------------------------- Nieograniczona pojemnosc skrzynki >>> http://link.interia.pl/f19e6

17 years, 8 months

[linux-audio-dev] Recommended books for new audio developers

by Damon Chaplin

Hi, What are the recommended books to read for people new to audio development? (Covering things like synthesis techniques, effects processing and basic acoustics stuff.) On the bottom of the Documentation section of linux-sound.org I found these 2: Computer Music Tutorial by Curtis Roads (1995, 1254 pages) Computer Music: Synthesis, Composition, and Performance by Charles Dodge and Thomas Jerse (1997, 480 pages) Though they seem quite old. Is there anything newer or better? I guess for Linux-specific issues you have to read the docs/source for things like ALSA, Jack, LADSPA/LV2, DSSI & LASH. Damon

17 years, 8 months

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Linux-audio-dev January 2007