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Hi, this message is a cross-post to the Sursound and ogg-dev mailig list. The developers on the ogg-dev list are defining the Ogg/PCM format and on Sursound list there discussion about Amisonics file formats recently. I have not been able to follow both disussion, just skimmed through. But maybe you can work together to bring Ambisonics into...

...ut its been quiet, so I > dont know who is who. > > My name is Etienne Deleflie, I am the creator of www.ambisonia.com, > and I am (together with the Ambisonic community) looking for a > 'delivery format' for Ambisonic data. > > There has been a lot of discussion on the sursound list (and even more > off-list) about how Ambisonics could be wrapped into Vorbis compressed > streams. A group of around 10 of us have been putting together a > 'proposal' (given our understanding of Vorbis) of how this could be > done. The aim of this group is to have a cohere...

Where can I find the Header file or whatever which specifies the "Mapping" flag. In feb - apr 2007, there was a lot of discussion about Ambisonics and Monty kindly stated that Mapping = 1 ; Denotes and Ambisonic file as opposed to = 0 which is 1 speaker/ 1 channel Has this been written explicitly into the standard? Which standard should I be looking at?

Hi Opus list. I subscribed because your discussion on the IETF draft ("Ambisonics in an Ogg Opus Container") was mentioned on the sursound list. I tried Opus for ambisonics more than a year ago. It does works with uncoupled channels (I had to patch the encoder). I don't know what else could be done to optimize support for ambisonics, as I'm not a codec expert. So I think that the easiest (and most important for now) is to d...

...ice. (actually, I'm not even a > developer anyway) Hi Gabriel, I doubt whether the Xiph community would promote a file format for Ambisonics without first seeing whether it had the support of the Ambisonic community *and* seeing it used in the wild. The Ambisonic crowd all hang out on the sursound list,(1) so you should post your proposal over there. (Links have been collected together at the end.) However, there was a heated discussion in August/September 2008 on that list about a new file format. Despite several hundred posts, no consensus emerged. My guess is that nobody over there has...

...which format to continue developing. WHO prefers we continue working as a community on development of (1) OggPCM or (2) OggPCM2? Cheers, Silvia. -----Original Message----- From: ogg-dev-bounces@xiph.org on behalf of Arc Sent: Tue 11/15/2005 8:12 AM To: oliver oli Cc: ogg-dev@xiph.org; sursound@music.vt.edu Subject: Re: [ogg-dev] Ambisonics und OggPCM On Tue, Nov 15, 2005 at 03:10:22AM +1100, Erik de Castro Lopo wrote: > That spec is being superceded by: > > http://wiki.xiph.org/index.php/OggPCM2 The project has been forked, not superceded. Work on OggPCM is continuing, t...

Hi Marc, On Sat, May 28, 2016 at 10:44 AM, Marc Lavallée <marc at hacklava.net> wrote: > I subscribed because your discussion on the IETF draft ("Ambisonics in > an Ogg Opus Container") was mentioned on the sursound list. Thanks for your interest! Please feel free to voice your support for this work on the codec at ietf.org mailing list. The more support the better. > I tried Opus for ambisonics more than a year ago. It does works with > uncoupled channels (I had to patch the encoder). I don't know...

...which format to continue developing. WHO prefers we continue working as a community on development of (1) OggPCM or (2) OggPCM2? Cheers, Silvia. -----Original Message----- From: ogg-dev-bounces@xiph.org on behalf of Arc Sent: Tue 11/15/2005 8:12 AM To: oliver oli Cc: ogg-dev@xiph.org; sursound@music.vt.edu Subject: Re: [ogg-dev] Ambisonics und OggPCM On Tue, Nov 15, 2005 at 03:10:22AM +1100, Erik de Castro Lopo wrote: > That spec is being superceded by: > > http://wiki.xiph.org/index.php/OggPCM2 The project has been forked, not superceded. Work on OggPCM is continuing, t...

...just blindly using the equations from > http://www.york.ac.uk/inst/mustech/3d_audio/secondor.html; one would > want to check this with someone really in the know before standardizing > on it.) only 5.1 encoded ambisonics is missing, i think it's called g-format. but i can ask in the sursound mailing list, if this options are sufficient.

> Also, there has been some recent work on channel mappings for OggPCM (uncompressed PCM data in an Ogg container), which may be related: Our proposal involves only Vorbis. Uncompressed PCM Ambisonics is already well catered for. > It is indeed related. We are proposing a different ambisonic channel scheme (not speaker mapping though) called N3D (different to the usual FuMa scheme). The

Josh Coalson wrote: > --- smoerk <smoerk@gmx.de> wrote: > >>i didn't find anything about tagging flac files as surround files. i >>think there should some possibility to tell the player how to play a >>multi-channel file (how to map the different channels to the speakers >>or if there some decode is needed, like for ambisonic files). > > > it

...einventing the wheel, square. (Newbie intro: I'm a 27-year old Finnish math/CS student and coder, with a long term personal interest in both audio processing and external memory algorithms, yet without an open source implementation background. I joined the list after OggPCM was mentioned on sursound, so it's also safe to assume I'm an ambisonic bigot.) -- Sampo Syreeni, aka decoy - mailto:decoy@iki.fi, tel:+358-50-5756111 student/math+cs/helsinki university, http://www.iki.fi/~decoy/front openpgp: 050985C2/025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2

...czyk at google.com> wrote : > Hi Marc, Hi Micheal. > On Sat, May 28, 2016 at 10:44 AM, Marc Lavallée <marc at hacklava.net> > wrote: > > I subscribed because your discussion on the IETF draft ("Ambisonics > > in an Ogg Opus Container") was mentioned on the sursound list. > > Thanks for your interest! Please feel free to voice your support for > this work on the codec at ietf.org mailing list. The more support the > better. I will! > > I tried Opus for ambisonics more than a year ago. It does works with > > uncoupled channels (I had...

I made a few updates to OggPCM2 http://wiki.xiph.org/index.php/OggPCM2 reflecting the latest discussions. Could everyone have a look at it and see if they agree. Otherwise, what do you feel should be changed? Anyone wants to speak in support of chunked PCM? For all those that are just tired of this mess like me, please express yourself in the new spec I created: OggPCM3

It obviously would be nice to have such a mode available, for e.g. DVD audio compression. Apparently, the list doesn''t tell me too much about it. My questions are: 1. What is the current status of the 5.1 channel coupling in Vorbis? 2. If I''ll be interested in participation in its development, what is the recommended reading? -------------- next part -------------- An HTML