Re: [Sursound] Patent application: Data structure for HOA

2012-10-30 Thread Richard Lee
Unless things have changed a lot, last I checked lossy compression messes up phase relationships, and that would be an issue for things like UHJ, which as long as portable stereo players with limited battery life (and thus limited CPUs), is the only viable, because stereo compatible,

Re: [Sursound] Patent application: Data structure for HOA

2012-10-30 Thread Peter Lennox
Am I missing something? - for mobile use, wouldn't B-format to binaural be better than UHJ? Dr Peter Lennox School of Technology, Faculty of Arts, Design and Technology University of Derby, UK e: p.len...@derby.ac.uk t: 01332 593155 From:

Re: [Sursound] Patent application: Data structure for HOA

2012-10-30 Thread Martin Richards
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Re: [Sursound] Patent application: Data structure for HOA

2012-10-30 Thread Eero Aro
Richard Lee wrote: Take your favourite Nimbus UHJ CD and rip it using the most evil MP3 encoder you can find Sorry, slightly off-topic, but still: Some people have done terrible data reduction to UHJ recordings already: http://www.youtube.com/watch?v=FnvRtM5WDsc

Re: [Sursound] Ambisonic 'File' Formats

2012-10-30 Thread Michael Chapman
There's also the possibility of a new version of Broadcast Wav (BWF). Dave Thanks Dave, URL and/or other reference ??? 'Native' CAF also has the possibility for 'W,X,Y,Z' so (again without acknowledgment) I suspect that could be counted as a *.amb variant. MPEG formats: anyone have

Re: [Sursound] Ambisonic 'File' Formats

2012-10-30 Thread Aaron Heller
On Tue, Oct 30, 2012 at 9:01 AM, Michael Chapman s...@mchapman.com wrote: 'Native' CAF also has the possibility for 'W,X,Y,Z' so (again without acknowledgment) I suspect that could be counted as a *.amb variant. Has anyone had any success with this? It's in the Core Audio header files, but a

Re: [Sursound] Ambisonic 'File' Formats

2012-10-30 Thread Ronald C.F. Antony
Whatever it is, if it's a 32-bit file format, it should be considered deprecated. CAF is at least explicitly designed to be a 64-bit format. It's also designed such that during recording a crash of the app can leave a recoverable file behind by the way the header structures are designed, much

Re: [Sursound] Patent application: Data structure for HOA

2012-10-30 Thread Ronald C.F. Antony
On 29 Oct 2012, at 20:42, Stefan Schreiber st...@mail.telepac.pt wrote: Ronald, most if not all (classical) recordings where I am participating are done in a way that they could be issued in 5.1 (or say 5.0) surround, namely several Pentatone recordings, and even the more recent

Re: [Sursound] Patent application: Data structure for HOA

2012-10-30 Thread Ronald C.F. Antony
On 30 Oct 2012, at 06:24, Peter Lennox p.len...@derby.ac.uk wrote: Am I missing something? - for mobile use, wouldn't B-format to binaural be better than UHJ? Dr Peter Lennox Of course it would. Do you know of a mobile playback device with multi-channel audio support, multi-channel audio

Re: [Sursound] Patent application: Data structure for HOA

2012-10-30 Thread Ronald C.F. Antony
On 29 Oct 2012, at 20:56, Stefan Schreiber st...@mail.telepac.pt wrote: Oh yes, go to Apple and look if they listen to your ideas, and let others do their stuff instead of doing some promotion for some stylish, fahionable campany offering super slim products. You make my point: they won't