Linux-audio-dev December 2006

linux-audio-dev@lists.linuxaudio.org

52 participants
39 discussions

[linux-audio-dev] 31st International AES Conference - New Directions in High Resolution Audio

by Betty Woessner

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 31st International AES Conference - New Directions in High Resolution Audio June 25-27, 2007 London, UK +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Submissions site now open! Please let the conference organizers know of your intent to contribute or attend. Further detail available at http://www.aes.org/events/31/ The 31st International Audio Engineering Society Conference, entitled New Directions in High Resolution Audio, will be held at Queen Mary, University of London, from June 25th-27th, 2007. This Conference is concerned with the promotion and delivery of high resolution audio, by maintaining quality throughout the recording and playback chain with current and future technologies. It reflects the tremendous recent growth of high resolution audio techniques and products intended for use throughout the audio recording and playback chain. However, issues remain on how to avoid bottlenecks where quality is compromised, and how to maintain and encourage high resolution audio in an everchanging marketplace. These concerns are of interest to the audio engineering, recording and production industries, as well as to education and academia. We aim to provide a place for the exchange of news, issues and results, by bringing together researchers , developers, educators, students and professional users, working in fields that contribute to high resolution audio, to present original theoretical or practical work. It also serves as a discussion forum, provides introductory and in-depth information in specific domains, and showcases current products. The 31st AES Conference solicits contributions to the field of high resolution audio, including, but not limited to, the following domains and topics: High resolution recording issues * Bandwidth, sampling rate, dynamic resolution and spatial representation. * Analog and digital recording equipment Processing, manipulation and preparation of high resolution signals * High quality analog design * A/D and D/A conversion * Format and sample rate interconversions * High-resolution signal processing, 1 to n bit paradigms * Spatial audio, virtual and acoustic spaces, virtual image manipulation Storage of high resolution audio * Current and future storage technology for high-density audio data * Overview of high resolution consumer formats * Copy protection * Access speed, data reliability, bit packing and compression * Professional archival formats and future-proofing Electronic delivery of high resolution audio * Network (wired and wireless) systems/delivery of high quality audio content * Current and future formats for streaming and file delivery of high resolution audio * Bandwidth * Digital radio and broadcast applications including multichannel audio Maintaining quality at playback * Evolving technology for multiformat players * PC-based playback: configuration and interfacing * Converter technologies * Jitter/interface/power supplies and other related forms of noise * Digital amplification e.g., Class-D amplifiers Perception * Perceptual modeling. * Objective evaluation and subjective performance of high-resolution audio * Objective measurement and resolution issues * Subjective procedures and evaluation psychology +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ SUBMISSIONS Submissions, which will be peer-reviewed, may be in the following categories: - paper (to be presented in the main sessions) - poster or demonstration (to be presented in the poster sessions) - original composition demonstrating features of high resolution audio (to be showcased throughout the conference) - tutorial, panel or workshop proposals (see conference web site for details) Recording companies. publishers, software and hardware developers, etc., are invited to contact the programme committee regarding exhibition space. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ DEADLINES Deadline for submissions of tutorials, panels and workshops: Feb. 2nd 2007. Deadline for submissions of papers and posters/demos: Feb. 2nd 2007. Deadline for exhibitor space: June 1st 2007. Please see the conference website for more information; http://www.aes.org/events/31/

19 years

[linux-audio-dev] 31st International AES Conference - New Directions in High Resolution Audio

by Betty Woessner

Apologies if you receive multiple copies] +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 31st International AES Conference - New Directions in High Resolution Audio June 25-27, 2007 London, UK +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Submissions site now open! Please let the conference organizers know of your intent to contribute or attend. Further detail available at http://www.aes.org/events/31/ The 31st International Audio Engineering Society Conference, entitled New Directions in High Resolution Audio, will be held at Queen Mary, University of London, from June 25th-27th, 2007. This Conference is concerned with the promotion and delivery of high resolution audio, by maintaining quality throughout the recording and playback chain with current and future technologies. It reflects the tremendous recent growth of high resolution audio techniques and products intended for use throughout the audio recording and playback chain. However, issues remain on how to avoid bottlenecks where quality is compromised, and how to maintain and encourage high resolution audio in an everchanging marketplace. These concerns are of interest to the audio engineering, recording and production industries, as well as to education and academia. We aim to provide a place for the exchange of news, issues and results, by bringing together researchers , developers, educators, students and professional users, working in fields that contribute to high resolution audio, to present original theoretical or practical work. It also serves as a discussion forum, provides introductory and in-depth information in specific domains, and showcases current products. The 31st AES Conference solicits contributions to the field of high resolution audio, including, but not limited to, the following domains and topics: High resolution recording issues * Bandwidth, sampling rate, dynamic resolution and spatial representation. * Analog and digital recording equipment Processing, manipulation and preparation of high resolution signals * High quality analog design * A/D and D/A conversion * Format and sample rate interconversions * High-resolution signal processing, 1 to n bit paradigms * Spatial audio, virtual and acoustic spaces, virtual image manipulation Storage of high resolution audio * Current and future storage technology for high-density audio data * Overview of high resolution consumer formats * Copy protection * Access speed, data reliability, bit packing and compression * Professional archival formats and future-proofing Electronic delivery of high resolution audio * Network (wired and wireless) systems/delivery of high quality audio content * Current and future formats for streaming and file delivery of high resolution audio * Bandwidth * Digital radio and broadcast applications including multichannel audio Maintaining quality at playback * Evolving technology for multiformat players * PC-based playback: configuration and interfacing * Converter technologies * Jitter/interface/power supplies and other related forms of noise * Digital amplification e.g., Class-D amplifiers Perception * Perceptual modeling. * Objective evaluation and subjective performance of high-resolution audio * Objective measurement and resolution issues * Subjective procedures and evaluation psychology +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ SUBMISSIONS Submissions, which will be peer-reviewed, may be in the following categories: - paper (to be presented in the main sessions) - poster or demonstration (to be presented in the poster sessions) - original composition demonstrating features of high resolution audio (to be showcased throughout the conference) - tutorial, panel or workshop proposals (see conference web site for details) Recording companies. publishers, software and hardware developers, etc., are invited to contact the programme committee regarding exhibition space. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ DEADLINES Deadline for submissions of tutorials, panels and workshops: Feb. 2nd 2007. Deadline for submissions of papers and posters/demos: Feb. 2nd 2007. Deadline for exhibitor space: June 1st 2007. Please see the conference website for more information; http://www.aes.org/events/31/

19 years

[linux-audio-dev] Audio Driver Sample Code

by oscar si

Hello: Could anyone please tell me if there are sample driver codes for PCI based sound card that are not using either alsa or oss? Thank you very much, Oscar __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

19 years

[linux-audio-dev] Daemon mode

by Patrick Shirkey

Hi, I am adding a Daemon mode to jackEQ and have most of the code in place now. I am stuck at the point where the daemon starts up and keeps going. Essentially I need the daemon mode equivalent of gtk_main() that keeps ticking over until the app is told to stop or otherwise shutdown. I have not threaded the app at this point so hopefully there is a very simple solution. Any thoughts on this are appreciated. Cheers. -- Patrick Shirkey - Boost Hardware Ltd. Http://www.boosthardware.com Http://lau.linuxaudio.org - The Linux Audio Users guide ======================================== "Anything your mind can see you can manifest physically, then it will become reality" - Macka B

19 years

[linux-audio-dev] kernel 2.6.18, -19 etc

by Jens M Andreasen

Now that mingo's (et al) RT patches are coming into mainstream, what is the corporate rationale behind it and the running order of urgency? I am fishing for some information on; if it is the disk-drives, the network drivers, the usb stack or something else that I am too ignorant to have noticed? What worries me the most, is corner-cases on network, blocking multiple cpu's. FYI: I have been asked to set up a bunch of Xeon boxens to serve a VPN over WiFi, they/we are currently using kernel 2.6.17 (debian etch as of today.) So this is not stricly about audio, but I would guess all of us would like some clarification here. After all, we have followed the evolvement of these patches for quite a few years by now. -- mvh // Jens M Andreasen

19 years

[linux-audio-dev] Grabbing sound using Roland Edirol FA-101

by Helge Fredriksen

Hello! Did any of you guys ever tried to use the OpenAL API interface towards a Firewire sound device like FA-101? I see that it appears on your lists as a device that has drivers on Linux. Best regards, Helge Fredriksen

19 years

[linux-audio-dev] linux-sound porting & documentation proposal (Was: Attracting more Linux audio developers)

by Ivica Ico Bukvic

How about we stop the seemingly endless discussion and instead all roll-up our sleeves and actually do this? Here's what I offer on behalf of linuxaudio.org: 1) generous hosting space 2) virtually unlimited bandwidth 3) docs.linuxaudio.org and apps.linuxaudio.org domains 4) accounts to maintainers 5) server support as needed What we need volunteers to do: 1) port Dave's pages over into a legible and appealing format to apps.linuxaudio.org 2) cross-link those pages to docs.linuxaudio.org page (in addition to apps homepages) which will be a wiki with documentation templates and standardized layout 3) need to design an appealing interface for both sites (hence consider this an open call for volunteer designers) -- this cannot be emphasized enough: we do not want an ugly, plain website, but a nice inviting and user-oriented resource. 4) create a generic wikipedia entry which gives a summary, philosophy, and notable achievements of the linux audio scene and provides critical links (hence it would be used as a portal rather than an exhaustive resource for a moving target which would never fly with the wikipedia editors anyhow) On a side note, here's another offer: As per my discussion with Joern, on behalf of linuxaudio.org I also offer free unlimited space for porting over LAU and LAD lists to lists.linuxaudio.org in hopes that we continue consolidating these invaluable resources. Maintainers will be given appropriate access privileges etc. Any takers? Best wishes, Ico

19 years

[linux-audio-dev] IEC 60608 or IEC 61672 Leq(A) measurement

by Andres Cabrera

Hi all, I'm building a measuring system (naturally will be GPL'd, and initially linux only) aimed at audio post, and it would be great (and the main purpose) to include Leq(A) measurements, which are defined in IEC 60608 or the newer IEC 61672. Does anyone have access to this information or does anyone know this standard? Thanks, Andrés

19 years

Re: [linux-audio-dev] Grabbing sound using Roland Edirol FA-101

by Jonathan Woithe

Helge Fredriksen wrote: > > Did any of you guys ever tried to use the OpenAL API interface towards a > Firewire sound device like FA-101? I see that it appears on your lists as a > device that has drivers on Linux. AFAIK OpenAL doesn't talk to hardware directly - it provides an API for programs to use but sends data to the soundcard via the operating system's native sound system. Therefore the devices supported by OpenAL are the devices supported by the underlying operating system. For many sound cards under Linux, that native sound system is ALSA (http://www.alsa-project.org). OSS was the previous default native sound system under Linux and is still in use by numerous programs. The FA-101 is (as you'd know) a firewire interface. Support for firewire interfaces is starting to gain momentum now but for various technical reasons this is not provided by ALSA at this time. The support effort is the so-called Freebob project (http://freebob.sourceforge.net) in combination with the JACK system (http://www.jackaudio.org/), a low-latency audio API. Only a small number of firewire audio interfaces are supported by freebob at this time, but from what I read the FA-101 is one of them. Getting back to your question, if OpenAL supports JACK under Linux then in theory you could talk to an FA-101 via OpenAL. According to the OpenAL website it currently only supports OSS and ALSA under Linux. Therefore at this point in time you can't use OpenAL to send audio to an FA-1-1. However, unless you particularly wanted the 3D modelling features of OpenAL you'd probably be better off using the JACK API directly. It should be noted that a long-term goal of the freebob project is to implement an ALSA driver for the firewire interfaces. However, there is still much to do before that will occur so I can't see it appearing any time soon. Once it did appear (and assuming OpenAL don't implement an interface to JACK earlier) you would be able to use OpenAL with the FA-101. Regards jonathan

19 years

[linux-audio-dev] OT: interesting angle on the NOVL-MSFT deal

by Ivica Ico Bukvic

http://weblog.infoworld.com/enterprisemac/archives/2006/12/leopard_server.ht ml Ico

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Linux-audio-dev December 2006