naturerecordists
[Top] [All Lists]

Re: ambisonic audio

Subject: Re: ambisonic audio
From: "Brian Valente" bvalente
Date: Fri Sep 28, 2018 10:51 am ((PDT))
Hi Aaron



Thanks for your thoughts.





Regarding a =93next generation=94 type of setup, what do you think is missi=
ng. Is it in the mics/capture, or more in the post processing, or maybe bot=
h?









Thanks



Brian



portfolio https://www.brianvalentephotography.com/



From:  =
..com]
Sent: Thursday, September 27, 2018 3:27 PM
To: 
Subject: Re: [Nature Recordists] ambisonic audio



 

Hi Brian,

I got excited at the prospect of taking an Ambisonics mic into the field to=
 do the kind of 'anthropogenic'-centric soundscape recording I've done lots=
 of using near-binaural mics (and some Blumlein and M/S and spaced omni).

The tantalizing prospect was to take composed immersive sound to the next l=
evel, allowing and playing with, as you say, listener head position=96espec=
ially since platforms like YouTube and Facebook support headset decode and =
have some rudimentary HRTF synthesis...

....long story short, my enthusiasm cooled significantly when I played with=
 live-decode from recordings made with second-generation tetrahedral ambiso=
nics, because for people used to 'rich' stereo with a lot of subtle cues fo=
r e.g. depth and focused localization, the stereo image produced felt very =
vague and flat=96more like an uneven flat sphere than a three dimensional s=
pace, as it were.

>From what I understand higher-order Ambisonics fills in the 'holes' and giv=
es more, but IMO what's going to be really necessary for the technique to w=
ork as I want is to somehow capture, and be able to "remove in post" the ti=
ming and maybe to some extent frequency variation characteristic of HRTF, a=
nd synthesize more accurately those differences for the realtime-rendered h=
ead position.

I have vague ideas of how one might in theory attempt this, there should be=
 enough information in a tetrahedral array=96and there should be ways of e.=
g. using a nested double tetrahedral array at controlled spacing, maybe wit=
h the inner set serving as an occluding baffle...

....but that would require a lot of computation if it worked at all...

....and I'm too lazy personally to take it on. So far.

But absent some kind of next-generation step up, I am myself waiting for mo=
re to be there before jumping... :/

aaron



On Thu, Sep 27, 2018 at 1:59 PM 'Brian Valente'  <mailto:=
>  [naturerecordists] < <=
> > wrote:



Hi all,



Is anyone experimenting or working with ambisonic audio?



I see new VR microphones out there, Zoom just released a 360 mic for around=
 $350



I=92ve always been a fan of and recorded ambient, but I really love the ide=
a of putting on headphones and as the you move your head, the audio moves a=
ccordingly so it=92s as though you were really there





I just haven=92t seen much in the way of standalone ambisonic audio or head=
phones for that purposes.









Thanks



Brian



portfolio https://www.brianvalentephotography.com/










--

   <>
  quietamerican.org <http://quietamerican.org>
  oneminutevacation.org <http://oneminutevacation.org>

  83% happy
   9% disgusted
   6% fearful
   2% angry











"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.



------------------------------------------------------------------------
Yahoo Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/naturerecordists/

<*> Your email settings:
    Digest Email  | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/naturerecordists/join
    (Yahoo! ID required)

<*> To change settings via email:
    
    

<*> To unsubscribe from this group, send an email to:
    

<*> Your use of Yahoo Groups is subject to:
    https://info.yahoo.com/legal/us/yahoo/utos/terms/

------------------------------------------------------------------------


<Prev in Thread] Current Thread [Next in Thread>
Admin

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU