Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

I have decided to simplify the DIY head tracking dongle build and setup in some aspects, now I have ordered this sensor that do not need initial calibration. This is the new sensor module: https://learn.adafruit.com/adafruit-neopixel-uberguide/overview It will initially be combined with a

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Stefan Schreiber wrote: Richard Lee wrote: Just to bring everyone down to earth .. There are two easily reproduced experiments first carried out by prominent members of this group which put these effects into perspective. They are the Greene/Lee Neckbrace and Malham/Van Gogh Experiment

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

A paper on the importance of shoulder reflections and torso diffraction in lower frequencies for elevation cues. Sadly no data for impact of torso turning in relation to the head.

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Richard Lee wrote: Just to bring everyone down to earth .. There are two easily reproduced experiments first carried out by prominent members of this group which put these effects into perspective. They are the Greene/Lee Neckbrace and Malham/Van Gogh Experiment The first shows 'real

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Richard Lee wrote: Just to bring everyone down to earth .. There are two easily reproduced experiments first carried out by prominent members of this group which put these effects into perspective. They are the Greene/Lee Neckbrace and Malham/Van Gogh Experiment The first shows 'real

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Richard Furse wrote: Interesting thread! At the risk of accusations of marketing (the shame, the shame!)*, I thought I'd provide a few details on how Blue Ripple Sound approaches binaural HOA decoders. There are certainly no marketing issues here, especially since this thread has started

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Richard Lee wrote: Just to bring everyone down to earth .. There are two easily reproduced experiments first carried out by prominent members of this group which put these effects into perspective. They are the Greene/Lee Neckbrace and Malham/Van Gogh Experiment The first shows 'real

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

After reading lots views Oh my dear, this reads like a Russian to German to English translation... Probably my brain is still recovering from some alcohol intoxication suffered at a certain point during my childhood, which I even can't remember because of the usual mechanisms of

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

https://www.google.se/url?sa=t=web=j=https://notendur.hi.is/~spagnols/pubbl/ICSV_2015.pdf=0ahUKEwj-se-KwtLKAhUFwHIKHYX6CWAQFgg1MAk=AFQjCNHQlgAIQgBkfCsP-bA8Vop-ww0wYg=lrdagh2wB-trUTu6EJr7aA These guys have almost certainly the knowledge in how to create a head tracking controlled filter to fake

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

http://multi-science.atypon.com/doi/abs/10.1260/1351-010X.18.1-2.227#/doi/abs/10.1260/1351-010X.18.1-2.207 These are are relevant From my point of view for head above torso impact. If this could be included in head tracked conversion for FOA to binaural, I think it would improve it. One way

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

> On 30 Jan 2016, at 00:05, Richard Lee wrote: > > Just to bring everyone down to earth .. > > There are two easily reproduced experiments first carried out by prominent > members of this group which put these effects into perspective. They are > the > > Greene/Lee

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Interesting thread! At the risk of accusations of marketing (the shame, the shame!)*, I thought I'd provide a few details on how Blue Ripple Sound approaches binaural HOA decoders. We DO use an approach which shares quite a bit with Archontis' suggestions. I prefer this to the "virtual

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Just to bring everyone down to earth .. There are two easily reproduced experiments first carried out by prominent members of this group which put these effects into perspective. They are the Greene/Lee Neckbrace and Malham/Van Gogh Experiment The first shows 'real life' Fixed Head

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

HI Bo-Erik, Sorry I wasn’t very clear on my comments about the HRTF order, Jörn covered it much better! You need very high orders if you want to preserve HRTFs as they are when you measure them, and the order that you can expand them depends on how many points you measure them around the

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

I have been wanting to say exactly what richard lee says, for many days now. Only I could not figure out an unambiguous way of putting it down. umashankar Sent from Mail for Windows 10 From: Richard Lee Sent:

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

On 01/28/2016 10:12 PM, Bo-Erik Sandholm wrote: I do understand that HOA can represent resolution of directivity in the mathematic domain better than FOA. But I am starting to suspect we are overworking something when we are talking of order 8 to 15? talking about using order 15 to retain the

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Bo, The point is that FOA never appealed to those elements of HRTFs in the 6K+ region (well, actually, much lower than that) - which is where pinnae cues are most important. That is, FOA simply 'neutralises' pinnae cues by homogenization Or, to put it another way, if you want pinnae cues (i.e.

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

I do understand that HOA can represent resolution of directivity in the mathematic domain better than FOA. But I am starting to suspect we are overworking something when we are talking of order 8 to 15? Is it realistic to even think of measuring individual HRTF response with that angle resolution?

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Hi Fons, ___ From: Sursound [sursound-boun...@music.vt.edu] on behalf of Fons Adriaensen [f...@linuxaudio.org] Sent: 27 January 2016 23:58 To: sursound@music.vt.edu Subject: Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Politis Archontis wrote: Hi Jorn, yes that is correct. I think however that the virtual loudspeaker stage is unnecessary. It is equivalent if you expand the left and right HRTFs into spherical harmonics and multiply their coefficients (in the frequency domain) directly with the coefficients

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Marc Lavallée wrote: Free documents from Rozenn Nicol: https://tel.archives-ouvertes.fr/tel-01066312/ http://www.sga-ssa.ch/docs/events/120510_ssa_printemps2012_01-nicol.pdf Great links. Many thanks! The "Spectral Cue" (SC) concept - referring to localization in the median plane - seems

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

It's a pity MAG wasn't around to work on this - I know he had already thought about it in the eighties (and probably early) as he mentioned it in one of the discussions we had at one of the APRS or AES convention. Mind you, I say "discussions" but I never contributed that much as my brain was

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

On Wed, Jan 27, 2016 at 01:27:59PM +, Politis Archontis wrote: > Something that has worked well for me is to replace the > (unmeasurable) low frequency HRTF with the response of a > spherical head model, ... The LF part can be even be formed directly from W and a first order highpass

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

As Fons have done optimisations in the low frequency range up to a few hundred hertz resulting resulting in shorter HRIRs. Any comment on the possibility of ignoring the individual impact is of ear shape above 4kHz in a HRTF? Would that not also simplify coding to binaural? Or at least

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Hello, may I point you to the AES Monograph on Binaural Technology by Rozenn Nicol, published on 2010. Rozenn has nicely summarised most of the issues which have been discussed here lately, and she provides an extensive list of references (more than 200!). Well worth reading (35$ for AES

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

HI, yes there are multiple works from many reearchers on spherical harmonic expansion of HRTFs (Evans, Duraiswami, Dylan Menzies and others), Rozenn Nicol’s is a very thorough one, and the last (probably) on the list are two nice papers from Romigh and Brungart in IEEE’s Journal of Selected

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

On 01/27/2016 10:02 AM, florian.came...@orf.at wrote: Hello, may I point you to the AES Monograph on Binaural Technology by Rozenn Nicol, published on 2010. Rozenn has nicely summarised most of the issues which have been discussed here lately, and she provides an extensive list of references

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Hi Fons, these are great points you raise here! On 27 Jan 2016, at 00:13, Fons Adriaensen > wrote: I've been reading this thread with much interest, as it is exactly about the topic I've been working on for the last two months. * Most HRIR

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

On 01/26/2016 11:05 PM, Politis Archontis wrote: Hi Jorn, yes that is correct. I think however that the virtual loudspeaker stage is unnecessary. It is equivalent if you expand the left and right HRTFs into spherical harmonics and multiply their coefficients (in the frequency domain) directly

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

A student, Mike (?) Evans, of colleagues of mine from the Department of Electronics at York did some work on a spherical harmonic representation of HRTF's back in the 1990's. I haven't got the paper handy but I seem to remember he ended up concluding you'd need something like 15'th order to get

[Sursound] Never do math in public, or my take on explaining B-format to binaural

On 01/26/2016 06:36 PM, Stefan Schreiber wrote: 2. < 8 > impulses (for 4 virtual speakers) implies that you don't support 3D decoders (?). If not, why this? (Immersive/3D audio is on the requirement list for VR. It wouldn't make a lot of sense if all sound sources will follow your gaze -

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Hello Jörn, On Tue, Jan 26, 2016 at 12:52 PM, Jörn Nettingsmeier < netti...@stackingdwarves.net> wrote: > > Of course, that does not take into account dual-band decoding. But if we > express the cross-over filters as another convolution and split the > decoding matrix into a hf and lf part, we

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Hi Jorn, yes that is correct. I think however that the virtual loudspeaker stage is unnecessary. It is equivalent if you expand the left and right HRTFs into spherical harmonics and multiply their coefficients (in the frequency domain) directly with the coefficients of the sound scene (which

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

On Tue, Jan 26, 2016 at 09:52:21PM +0100, Jörn Nettingsmeier wrote: > On 01/26/2016 06:36 PM, Stefan Schreiber wrote: > > >2. < 8 > impulses (for 4 virtual speakers) implies that you don't > >support 3D decoders (?). If not, why this? (Immersive/3D audio is on the > >requirement list for VR. It

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

On Tue, Jan 26, 2016 at 10:05:07PM +, Politis Archontis wrote: > yes that is correct. I think however that the virtual loudspeaker > stage is unnecessary. It is equivalent if you expand the left and > right HRTFs into spherical harmonics ... True, but the problem with this is that it

Re: [Sursound] Never do math in public, or my take on explaining B-format to binaural

Hi Fons, I think I see your point, but I still believe they are equivalent in any case? In the end by having a lower-order sound field recording (eg B-format), than the expansion order of the HRTFs at some frequency, the spatial product is going to be limited by the sound-field order. If there