Last year I hacked a "low latency" (~100ms) stereo RTP streaming
software between OSX and a Raspberry Pi. A possible solution would be,
as Bo Erik suggested, to stream 4-channel on a musticast wifi network,
then decode it on 4 RPIs (or similar boards), making sure they are in
sync (using PTP). This is on my long list of things to try, but I would
need a specific project to kick-start this exploration. I'm in the
process of setting up a 4-channel system in my home office (using two
2.1 DIY "multimedia" system), so it's a good start. We could wait for
the industry to provide something usable, but it would be proprietary,
"professional", and expensive (because of the super-specific gold-plated
hardware, patents, shareholders, marketing, logos, slick web sites,
religious beliefs, etc). Also (who knows) maybe it's already possible to
do it using the jack2 software suite.
Marc
Le 28/05/2019 à 07:40, Augustine Leudar a écrit :
Weve tried local wifi networks at shows before but it was a bit unreliable
for droppouts etc then again so is Bluetooth. FOr home us it would be fine.
Four plug sockets might be a bit more doable than audio cables as well.
Wasn't there someone on here who was doing something DIY with the rasberry
pie ? Anyway it would nice to bring something commercially viable to market.
On Tue, 28 May 2019 at 09:39, Bo-Erik Sandholm <bosses...@gmail.com> wrote:
The Speakers won't be wireless as you probably want them to be powered.
But it should be easy with bluetooth 4.0 or Wi-Fi direct to create a
solution.
Normal Wi-Fi could be used.
The low cost esp8266 makes this possible in a diy setup...
Stream a 4 channel audiostream to the 4 speakers.
Have a switch on each speaker to select which channel it will playback.
Could possibly be solved by streaming 2 stereo channels on 2 different ip
ports over WiFi instead. 😎
Bo-Erik
Den tis 28 maj 2019 09:50Augustine Leudar <augustineleu...@gmail.com>
skrev:
wow :
https://youtu.be/KrVGTqRftKY
Problem is as most engineers know the result of room reflections is
generally comb filtering not increased spatialisation. Even if you could
somehow get this to work the time of the reflections would depend on room
size, the materials on the wall etc etc. It would be great if someone
could
just invent bluetooth quad (or more) then you could happily just deposit
four cable free bluetooth speakers around the room and be done with all
this nonsense.
On Tue, 28 May 2019 at 08:38, Augustine Leudar <
augustineleu...@gmail.com>
wrote:
Thats interesting - ive always wanted to hear transaural actually
working
- I've only tried Spat. However this would require the content
producers
(sound designers) to actually add HRTFs and use software to render
trnasaural filters the same as binaural - and most d not , genrally its
just the same stereo content used on two speakers produced over a
soundbar.
Even a soundbar isnt intelligent enough to decide which sounds should
appear where, marvelous though they are.
On Tue, 28 May 2019 at 01:55, Aaron Heller <ajhel...@gmail.com> wrote:
The soundbars I've heard sound like they use crosstalk cancellation
(aka
transaural stereo) to achieve surround effects. I believe the work of
Edgar
Choueiri and his students at Princeton represents the state of the art
in
that area.
https://www.princeton.edu/3D3A/index.html
Also Ralph Glasgal, an occasional poster on sursound --
http://www.ambiophonics.org
Aaron (hel...@ai.sri.com)
Menlo Park, CA US
On Mon, May 27, 2019 at 4:43 PM Augustine Leudar <
augustineleu...@gmail.com>
wrote:
Hi Douglas -
I dont think he was referring to Atmos soundbars just Atmos in
general .
Atmos will of course work nicely being a 9.1 (or is it 11.1 ?) bed
with
objects operating within that over an unlimited number of speakers
(or
is
it 128 max) - as such its true surround (in that the speakers od
actually
surround the litener); .
However its not particularily innovative in that it combines stuff
thats
been around for years - (ambisonics can decode to different speaker
arrays
from one file for example and I assume the objects move around using
amplitude panning). Then youve got things like DBAP which have the
potential to create far more convincing 3D audio scenes that ATMOS
and
thats been around a lot longer.
But no here we just refer to soundbars in general I think. I find it
very
unlikely though that an "ATMOS" soundbar would give the impression
of
a
sound being behind the listener than a basical quad setup where
there
actually are two speakers behind the listener.
I agree placebo definately plays a role in a lot of spatial audio.
On Mon, 27 May 2019 at 22:00, Douglas Murray <dmur...@well.com>
wrote:
On May 27, 2019, at 12:09 PM, mgraves mstvp.com <
mgra...@mstvp.com>
wrote:
See also Dolby Atmos. Yet another triumph of marketing over
reality.
Dolby is especially good in that arena.
Michael Graves
Michael,
Are you referring to the Dolby Atmos sound bars and ceiling
bouncing
speakers? If so I agree. But as a film sound designer, I don’t
believe
I am
succumbing to marketing hype when I say that Dolby Atmos in a
cinema
setting, with its full range surrounds and speakers in what were
gaps
near
the screen, is a real improvement over other earlier surround
formats
for
cinema. Clearly Dolby is trying to generate profits from the mass
home
market rather than only from the small cinema world. It’s probable
that
any
sound bar, whether “Atmos” or not, will be an upgrade for whomever
buys
it,
so happy customers, even if the hype is not lived up to. Maybe
it’s
the
placebo effect that makes these things work?
Doug Murray
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Company Number : NI635217
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www.magikdoor.net
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