This is why I am stunned that no known headphone manufacturer is using any
of all these widely available and really viable motion-tracking/gyroscope
chips, by now.
And: Things could be done in such an easier manner than ever before, by
now:
http://www.smyth-research.com/technology.html
The Realiser system includes a small device atop the headphone headband
and another small device at the front of the room, which together monitor
the position of the listener's head every five milliseconds.
(Bayer Headzone is similar and overcomplicated, from a current perspective.
http://www.beyerdynamic.de/shop/headzone-headphone-surround-system.html
You won't need any "base station" for HT, by now!)
You can replace both former solutions with available motion tracking ICs.
200 Hz is no problem by now.
(The Oculus Rift people give some specifications. I already wrote about
this, some time ago. )
Beside of this, I have written so often about the Wii control, iPhone
sensors, "Glass" motion sensors and Oculus Rift before that I seem entitled
to utter my private opinion. See also my recent posting of the person who
3D-printed a frame for a smartphone as stereo display system for a "3D
glass". (VR systems need HT and fast visual updates. "We" are all in-favour
of head-tracked 5.1/Ambisonics decoding, so to speak....)
Many thanks to Hector Centeno, anyway.
( It has become way too obvious that any current developments in audio
technology happen at an incredibly slow pace, compared to probably any other
area. This is probably also partially my own fault, just writing about
possible solutions and not actually doing them, cos I have a full-time job
and life... :-D I also would not blame the music or audiophile
industries, which don't know a lot about such complicated topics like
technology or music... On a more positive note, Hector has written some of
these apps for mobile devices which people (consumers) might actually use
in tough real-world/daily life conditions! This wasn't about the usual
Linux environment for connaisseurs, although < some > other people might
object that these < apps > would even not exist without Linux... Maybe this
was not the topic we should discuss! O:-) )
Best,
Stefan Schreiber
If this combination of technology is not the future of ambisonics then
I dont think anything is!
Can I ask ... what is the latency on the head-tracking?
Etienne
On Wed, Dec 11, 2013 at 2:25 AM, Hector Centeno <hcen...@gmail.com> wrote:
Hello all,
I just wanted to share with this list information about two Android
apps I've been working on and that I will release soon. I made them
because I thought it would be great to be able to listen to ambisonic
recordings in a portable way without the need of a full size computer.
The first app is called AmbiExplorer and it's a first order decoder to
stereo, with the option of choosing binaural or virtual microphones.
You can peform soundfield rotation and microphone polar patten
selection. It will also work with the device's orientation sensors so
you could attach your device to headphones and have head-tracked
binaural listening.
The second app is called TetraFile and it's a port of the offline
command line utility part of Fons' TetraProc. I made this so I could
connect my portable recorder (in card reader mode) directly to my
phone via USB OTG, transfer the A-format files and do a conversion to
B-format and listen using AmbiExplorer. It will read your tetrafile
calibration files from your phone's storage.
More info and a video demo are available here:
http://hcenteno.net/software.html
Any comments are welcome.
Best,
Hector Centeno
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