Discussion:
What is spacial audio?
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Brian Gaff
2023-05-02 09:34:19 UTC
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When I play tracks on Amazon in the last day or so it claims to support
special audio. Having played a few of their play, about the only thing I
hear different to the original tracks is a vague out of phase reverb. This
reminds me of the old Quadraphonic recordings they used to put out in QS,
which as far as I could deduce was a matrix that used partial separation for
rear speakers. Sometimes it was OK, sometimes dire.
The only true surround at the time was CD4, which used special cartridges
and styli, and the records owre out and became noisy with dropout after a
while.
So is this yet another Matrix like the BBC HJ which was quite good at
ambience, or is it just another con to get us to buy more kit. To me the
only worthwhile thing if you have the space is Dolby Atmos or the true
surround formats.
I must try rigging up an old hafler design in here and see if that works.
I do wish though, that the tracks used by the demo had some realistic
dynamic range and did not sound like Radio 1 on a bad day. There really is
no need to make the quiet parts nearly as loud as the loudest parts with
days high quality kit.
Brian
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Unsteadyken
2023-05-02 10:26:41 UTC
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In article <u2qleu$mp0a$***@dont-email.me>,

Brian Gaff says...
Post by Brian Gaff
The only true surround at the time was CD4,
Prerecorded quadraphonic open reel tapes were available and several
manufacturers produced suitiable playback machines.

https://en.wikipedia.org/wiki/Quadraphonic_open_reel_tape
Max Demian
2023-05-02 12:17:27 UTC
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Post by Unsteadyken
Brian Gaff says...
Post by Brian Gaff
The only true surround at the time was CD4,
Prerecorded quadraphonic open reel tapes were available and several
manufacturers produced suitiable playback machines.
https://en.wikipedia.org/wiki/Quadraphonic_open_reel_tape
They did produce a quadrophonic (4 tracks in each direction) cassette
recorder when quad was the in thing. I don't know how good it was.
--
Max Demian
Brian Gaff
2023-05-03 08:52:15 UTC
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Yes but what is this spacial audio. Is it effectively what we used to do
with analogue, ie the old stereo width anti phase system. It widens and
makes better use of the inbuilt acoustic reverb. I thought everything was
digital these days with a kind of object orientated mixing system.
Brian
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Post by Max Demian
Post by Unsteadyken
Brian Gaff says...
Post by Brian Gaff
The only true surround at the time was CD4,
Prerecorded quadraphonic open reel tapes were available and several
manufacturers produced suitiable playback machines.
https://en.wikipedia.org/wiki/Quadraphonic_open_reel_tape
They did produce a quadrophonic (4 tracks in each direction) cassette
recorder when quad was the in thing. I don't know how good it was.
--
Max Demian
Max Demian
2023-05-03 10:28:10 UTC
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Post by Brian Gaff
Yes but what is this spacial audio. Is it effectively what we used to do
with analogue, ie the old stereo width anti phase system. It widens and
makes better use of the inbuilt acoustic reverb. I thought everything was
digital these days with a kind of object orientated mixing system.
There's also binary stereo. I think that's when you have a dummy head
with microphones where the ears should be.
--
Max Demian
Andy Burns
2023-05-03 12:08:04 UTC
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Post by Max Demian
There's also binary stereo.
Binaural rather than binary?
Post by Max Demian
I think that's when you have a dummy head
with microphones where the ears should be.
My old maths teacher had such a head/mics/reel-to-reel setup at his
home, he demonstrated him walking up the creaky stairs vs a recording of
the same, it was very convincing.
Ashley Booth
2023-05-04 07:28:20 UTC
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Post by Andy Burns
Post by Max Demian
There's also binary stereo.
Binaural rather than binary?
Post by Max Demian
I think that's when you have a dummy head with microphones where
the ears should be.
My old maths teacher had such a head/mics/reel-to-reel setup at his
home, he demonstrated him walking up the creaky stairs vs a recording
of the same, it was very convincing.
Sennheiser made a binaural mic. I still have a demo recording made with
them. It works best with 'open-air' headphones such as the HD414.

--
Andy Burns
2023-05-04 09:05:22 UTC
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Post by Ashley Booth
Sennheiser made a binaural mic. I still have a demo recording made with
them. It works best with 'open-air' headphones such as the HD414.
I wish I knew were mine are, I put them somewhere 'safe' after the foams
disintegrated ...
Brian Gaff
2023-05-03 08:49:08 UTC
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Yes Teac had one, the prof version was branded tascam.
Brian
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Post by Unsteadyken
Brian Gaff says...
Post by Brian Gaff
The only true surround at the time was CD4,
Prerecorded quadraphonic open reel tapes were available and several
manufacturers produced suitiable playback machines.
https://en.wikipedia.org/wiki/Quadraphonic_open_reel_tape
Bing AI
2023-05-03 10:52:17 UTC
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Post by Brian Gaff
When I play tracks on Amazon in the last day or so it claims to support
special audio. Having played a few of their play, about the only thing I
hear different to the original tracks is a vague out of phase reverb. This
reminds me of the old Quadraphonic recordings they used to put out in QS,
which as far as I could deduce was a matrix that used partial separation for
rear speakers. Sometimes it was OK, sometimes dire.
Spatial audio is an audio experience that simulates a surround-sound
setup. It is intended to heighten immersion by simulating a
surround-sound setup. You can use spatial audio to simulate the
experience using just your headphones. Spatial audio builds upon
object-based audio and places “audio objects” in 3D space, allowing them
to move as the listener moves (head tracking) or as a scene plays out
[1][2].

[1]
https://www.howtogeek.com/764288/what-is-spatial-audio-and-how-does-it-work/
[2] https://www.androidauthority.com/what-is-spatial-audio-3188080/

It uses a post-production technique that can be applied to any audio
recording.
--
Bing AI
Brian Gaff
2023-05-04 10:56:10 UTC
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Well, I can do that with just phase relationships between channels its been
around analogue wise for years.
Brian
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Post by Bing AI
Post by Brian Gaff
When I play tracks on Amazon in the last day or so it claims to support
special audio. Having played a few of their play, about the only thing I
hear different to the original tracks is a vague out of phase reverb. This
reminds me of the old Quadraphonic recordings they used to put out in QS,
which as far as I could deduce was a matrix that used partial separation for
rear speakers. Sometimes it was OK, sometimes dire.
Spatial audio is an audio experience that simulates a surround-sound
setup. It is intended to heighten immersion by simulating a surround-sound
setup. You can use spatial audio to simulate the experience using just
your headphones. Spatial audio builds upon object-based audio and places
"audio objects" in 3D space, allowing them to move as the listener moves
(head tracking) or as a scene plays out [1][2].
[1]
https://www.howtogeek.com/764288/what-is-spatial-audio-and-how-does-it-work/
[2] https://www.androidauthority.com/what-is-spatial-audio-3188080/
It uses a post-production technique that can be applied to any audio
recording.
--
Bing AI
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