Linux-audio-dev June 2004

linux-audio-dev@lists.linuxaudio.org

99 participants
93 discussions

[linux-audio-dev] JACK/ALSA cannot set capture period lower than 512 with SBLive

by Lee Revell

Hey, It seems to be a known issue that you cannot run JACK with the capture period size lower than 512 with the SBLive ALSA driver. See this thread: http://ccrma-mail.stanford.edu/pipermail/planetccrma/2003-December/003764.h… and this: http://www.music.columbia.edu/pipermail/linux-audio-user/2003-April/004040.… The above threads seem to indicate that this is a hardware limitation. However it seems to me more like a driver issue. Using the kX drivers (on Windows, http://www.kxproject.com) with the exact same card, an old SBLive Platinum, Ableton Live is usable with the record and playback period sizes (set via ASIO driver config) at 64 samples (2.33 ms latency) with nothing else running, and rock solid at 128 (~5 ms) in the face of basically anything you throw at it. Of course it crashes, as it's Windows, using an alpha quality third-party driver, but is quite usable in a live music setting. 512x2 is not really usable for my purposes. Is this assessment correct, and if so, can someone familiar with the SBLive ALSA driver give me an idea as to how this could be fixed? Could this be done via ALSA config files maybe? Lee

20 years, 9 months

[linux-audio-dev] CCRMA summer workshops in Banff, Canada

by Scott Wilson

Greetings all, a quick note to bring to your attention some exciting audio summer courses happening this summer in Canada. This summer is a special one for the annual CCRMA summer workshops, the workshop series is expanded and is being held in a spectacular new setting at the Banff Centre for the Arts in the Canadian Rocky Mountains. All of the workshops include significant hands-on lab components. The labs will be done on Planet-CCRMA equipped linux workstations - a great opportunity to get acquainted with linux audio tools while learning volumes of useful theory and implementation details. New this summer is the Digital Audio Effects workshop taught by Jonathan Abel and David Berners with special guest Julius Smith. The course focuses on theory and practice of simulating / implementing a wide range of classic analog audio effects (including compressors, reverbs, equalizers ...) in the digital domain. Abel and Berners hail from Universal Audio and are the driving force behind UA's range of renowned and widely used digital audio effect plugins. Detailed descriptions of the courses and registration information is available here: http://www.banffcentre.ca/ccrma/ For questions please do not hesitate to contact the faculty of the courses you're interested in directly, myself, or the banff centre at arts_info(a)banffcentre.ca (1.800.565.9989 or 403.762.6180). Best Regards, scott wilson __________________________________________________________________ CCRMA@Banff Summer Workshops 2004 __________________________________________________________________ The Banff Centre and Stanford University welcome CCRMA (Centre for Computer Research in Music and Acoustics) to Banff this summer for six intensive programs where top educators and researchers from the fields of music, engineering, and computer science will present a detailed study of specialized subjects in an awe-inspiring setting. The CCRMA@Banff Programs Include: - Physical Interaction Design for Music (July 5 - July 16) Faculty: Scott Wilson, Michael Gurevich Guest: Bill Verplank - Haptic Musical Devices (July 19 - 23) Faculty: Charles Nichols Guest: Perry Cook - Digital Signal Processing I: Spectral & Physical Models (July 26- August 6) Faculty: Perry Cook, Xavier Serra - Perceptual Audio Coding (August 9 - 13) Faculty: Marina Bossi Guest: Richard Goldberg - ANET: High Quality Audio over Networks Summit (August 20-22) Faculty: Chris Chafe, Theresa Leonard - Digital Signal Processing II: Digital Audio Effects (August 16 - 27) Faculty: Jonathan Abel, Dave Berners Guest: Julius O. Smith About Music & Sound Programs at The Banff Centre: Music & Sound programs are dedicated to supporting emerging and mid-career artists and to providing personalized artistic direction suited to each participant. The goal is to nurture the creativity of musicians and audio engineers in a setting that allows for maximum personal artistic development and interaction with other musicians and artists in The Banff Centre community. Music & Sound alumni are found on concert stages and in professional positions nationally and internationally. Register now to ensure space, as availability is limited. For more information and to register, visit: http://www.banffcentre.ca/ccrma e-mail: arts_info(a)banffcentre.ca call: 1.800.565.9989 or 403.762.6180

20 years, 9 months

[linux-audio-dev]Using python for small multimedia app ?

by Cournapeau David

Hi there, I am discovering python, having looked for a matlab-like environement. I am wondering now if it is possible to do some small multimedia applications with it; more precisely, I would like to develop a scientific application for audio/video analysis. Basically, I need to show an avi video with a synchronised waveform view of the sound, and some other features views, like the pitch of the film voices (the actual pitch detection doesn't need to be computed on the fly). Python seems really great for rapid developement, but I wonder if it is possible to play different media synchronously (the media decoding itself will be of course coded in C/C++) with it? Does anyone here have any experience with multimedia and python ? cheers, David

20 years, 9 months

[linux-audio-dev] audio 5.1

by matteorox＠tin.it

i'm trying to create a program to create 6 mono wave files from n mono waves files in a virtual room, to re-create dolby 5.1 sound. have someone ideas about best algorithm to divide sound among diffusor? if someone of you is interesting, pls reply me...thanks

20 years, 9 months

[linux-audio-dev] timidity++ live

by Jens M Andreasen

Hi! What is the procdure to get timidity++ to work with an OSS raw midi in, live? mvh // Jens M Andreasen

20 years, 9 months

[linux-audio-dev] Voice playback with varying speed and same pitch

by Mario Lang

Hi. I am currently trying to write a player for the DAISY 2 and 3 Digital Talking Book formats for UNIX machines. One of the big great features of the hardware DAISY players available is to set ones own prefers playback speed while retaining the original pitch of the voice. This only works within a certain percentage of variation of course, but it does actually help a lot if you're used to fast speech. I am wondering if there are any existing libraries/command-line tools to do this. DAISY uses mp3 as its main audio format, so it would help if this tool could do it with mp3 directly, but I can probably integrate other solutions too. Any suggestions would be appreciated. Note that I do not really need an algorithm that works well with music in general, it only has to work well with the typical spectrum of a human voice. -- CYa, Mario | Debian Developer <URL:http://debian.org/> | Get my public key via finger mlang(a)db.debian.org | 1024D/7FC1A0854909BCCDBE6C102DDFFC022A6B113E44

20 years, 10 months

[linux-audio-dev] OpenJay Development Krew [OJDK]

by J_Zar

Finally, I would like to introduce the OpenJay Development Krew [OJDK], which actually is only a mailing list with little mail-traffic. The OJDK is the right place for OSS Dj oriented software developers: here you should find the right audience for discussing, sharing and improving code, take / give suggestions and similar. The OSS software is actually a powerful alternative (and with always greater occurrence a refferral point) in many fields. Although it is not the djing OSS case. There are many reasons for that: little OSS compatible hardware, few and small projects... few users... The closed ring of open dj software is based upon few users and few developers. Crashing it is my intention. To do that my efforts are enclosed in three projects (enough to cover the whole issue) : - OpenJay.org : the user side of the opensource dj world ; - OpenJay Development Krew [OJDK] : the developer side of the opensource dj world ; - Jay'O'Rama : my personal software solution which I'm developing since 1 year and that will be only an alternative ; You should think to OJDK not as a project factory, but mainly as an improving factor for code and a discussing place. Projects will come if needed and desired. Please...if you are an interested developer, CATCH THE OPPORTUNITY, join the OJDK list and mail it! More than money or hardware, I need more than ever some community help in these directions... There are already some project developers joined our little community. See the homepage for more info: http://www.openjay.org/ojdk http://www.ojdk.tk -- J_Zar Gianluca Romanin ---------------- see you at OpenJay.Org

20 years, 10 months

[linux-audio-dev] minor updates to Linux soundapps site

by Dave Phillips

Greetings: I've made some minor updates and URL corrections for the Linux soundapps site, but I've also discovered a problem with the European mirror. The site at www.linuxsound.at now presents an advertisement for ATNET, and the advert includes a link to http://linuxsound.atnet.at. Alas, that link doesn't work correctly either. I've written to ATNET twice already and have heard nothing from them. If the problem persists for another week I'll remove that link. The Japanese mirror is also experiencing a problem: apparently it isn't updating the top and TOC pages, which is uncool because I've added material to both those parts. Hopefully the Japanese mirror will update completely by this weekend. For the time, the only completely current site for the Linux soundapps pages is now: http://linux-sound.org And you all know the rest... Best regards, dp

20 years, 10 months

[linux-audio-dev] FSMSI 2004 - First european seminar on "Free Software for Multimedia Streaming over Internet"

by Media Innovation Unit - Firenze Tecnologia

[ Sorry for cross-posting - feel free to forward around ] ====================================================================== FSMSI 2004 First european seminar on Free software for multimedia streaming over internet June 23/24, 2004 IRCAM, Paris, France http://freesoftware.ircam.fr/fsmsi2004 ====================================================================== SCOPE OF THE SEMINAR The exponential growth of network speed makes it possible to exchange high quality audio and video contents over the Internet, often with real time capabilities. However, multimedia streaming still presents several issues with regards to Free Software and open standards: patents on software and data formats, free codecs availability, standards definitions, etc, etc. The goal of this seminar is to provide an overview of existing Free Software for multimedia streaming over Internet, to envisage future developments and collaborations in this area and to examine the possible ways to fund these developments. TOPICS OF INTEREST * Standards and open protocols for multimedia streaming * Free implementations of open protocols * Free players for multimedia contents * Free servers for multimedia streaming * Server architectures for multimedia streaming * Open multimedia formats * Free codec implementations * Real time multimedia streaming * Interactive multimedia applications INVITED SPEAKERS Carlo Calabrò (Videolan) François Déchelle (Ircam) Dominique Fober (Grame) Andrea Glorioso (MIU-FT) Eric Gressier (Cnam) Olivier Lescurieux (Ircam) Hans-Nikolas Locher (Cnam) Juan Carlos De Martin (IEIIT-CNR/Politecnico di Torino) Yann Orlarey (Grame) Patrice Tisserand (Ircam) SEMINAR PROGRAM Thursday, june 23: * presentations by the invited speakers * round table discussions for future projects and collaborations Friday, june 24: * presentations by the invited speakers * round table discussions for future projects and collaborations * "Bring your own laptop" hacking sessions ORGANIZATION COMITTEE Francois Déchelle, IRCAM (dechelle(a)ircam.fr) Andrea Glorioso, Media Innovation Unit - Firenze Tecnologia (sama(a)miu-ft.org) SEMINAR STREAMING The presentations will be streamed in OGG/VORBIS format. CONTACTS Web site: http://freesoftware.ircam.fr/fsmsi2004/ Mailing list: freestreaming-paris2004(a)lists.miu-ft.org http://lists.miu-ft.org/mailman/listinfo/freestreaming-paris2004

20 years, 10 months

[linux-audio-dev] [ANN] JJack 0.1 - Java for JACK initial release

by Jens Gulden

Hello, JJack 0.1 - Java bridge API for JACK has initially been released. http://jjack.berlios.de/ JJack is a framework for the Java programming language that allows creating and running portable audio processor clients for the JACK Audio Connection Kit. There are 3 alternative ways to run JJack clients: - using the JJack shell application - as JavaBeans - as standalone application Please let me know if you have created a Java audio application with JJack, it can be made available for download on the JJack site if you like. If someone knows how to compile the native bridge library libjjack.c for other OSs than Linux, please send the resulting binary to me. Co-developers are always welcome. Make noise. Jens

20 years, 10 months

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Linux-audio-dev June 2004