ML: "Maybe it can; is there a way to "up convert" non-ambisonics recordings to
horizontal ambisonics?"
If you down sample a 48kHz recording to 16kHz what happens? All the audio
information above 8kHz is lost right?
If you up convert back to 48kHz can you recover the bandwidth lost? No. You
just have a large file. Everything from 8kHz up is still missing... (where
would it come from? It's GONE!).
The concept is the same for directionality. Once you have selected the dimensional format
(stereo, ambi, 5.1, etc) any format with a lesser directional 'bandwidth' will be
rendered 'stuck'. The concept of "up-converting" dimensionally can only be a
smoke and mirrors illusion at best.
- Neil
On 7/9/2011 1:07 PM, Marc Lavallée wrote:
Fons Adriaensen<[email protected]> a écrit :
And *if* I turn my head, for whatever reason, and the illusion
collapses, I'm not impressed...
I just tried turning my head while listening to XTC. I can turn it more
than 45 degrees in both directions without destroying the stereo image.
So if turning the head is part of the localization process, it does
also work with XTC (to some extent).
XTC brings out a better and larger stereo image from conventional
stereo recordings, just by inserting a filter in the reproduction path
and by using two small frontal speakers (not four or more speakers all
around me as required by ambisonics). That's already impressive.
I still don't know from experience if ambisonics is better than XTC
for other than practical and ideological reasons. I hope to have a
second epiphany with ambisonics, because it requires more investments
and efforts to install a working system at home. I only heard a few
minutes of ambisonics (rendered with the Harpex filter on a
horizontal/hexagonal speakers setup), and it was interesting...
I would be impressed if ambisonics could provide a better listening
experience from stereo and/or 5.1 recordings. Maybe it can; is there a
way to "up convert" non-ambisonics recordings to horizontal ambisonics?
--
Marc
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