P3D Re: Audio VS Video

["Kersenbrock, Michael" <michaelk@xxxxxxxxxxx>]

"Gregory J. Wageman" wrote:
> 
> Mark Dottle writes:
> 

> Can you move a guitar player around in space as he comes off your stereo
> CD player?  I can manipulate the placement of sources in the stereo image

Yes if it dominates it's primary frequency footprint by passing it though
some equipment first.  I also can change the space around the guitar player
in quite a few ways by just changing the DSP setting on my Sony CD
player.  You know, hall, theatre, stadium, elevator, etc. sorts of settings.

I can even do that via the remote.

> In the average
> listening environment, stereo separation is quickly lost due to ambient
> reflections anyway.  However, the analogy holds because the *intent* was
> for the two elements to remain separate.

Well, except for headphones, one can *directly* hear sound from all
speakers with *both* ears.  Seems pretty crosstalk'y to me.  And if one
is using Bose speakers, then even the primary waves are reflected (all
over the place).  Imagine a Bose stereo slide projector.  It would
be placed "backwards".  :-)

One big difference between stereo photography and stereo sound (generally
speaking) is that stereo photography is usually trying to replicate
the experience of the eyes (at the eyes) while stereo sound is trying
to replicate the sound source *at* the sound source.  Sound systems
are duplicating the environment while light systems are trying to fool
the eyes that they are somewhere else.  Sound systems also are more
than sound.  An important part also is "feeling" the sound with
other than the ears.  Not just for 'electronic-music' either. There
are obvious classical music examples, but I think this is true
even for the less obvious.

Further, production of sound, although called "recording" seems to be
much more "synthetic".  Meaning that a large number of recordings are
made from various points and synthesized down to a stereo pair.  In
other words, professional stereo "recordings" are often if not
typically in the category that computer-generated stereo pairs might 
be thought in. It's not just a recording, but a production masterpiece 
in itself (it never actually sounded like that anywhere at any time).

An example that's thirty or so years old might be some of the things
the Beatles (Paul McCartney's old band) did in producing some of their 
stereo albums.  This includes things like cutting audio tape up 
into pieces and putting them back together randomly (and "things 
like that").

I think there is a similarity in terms of the words used, but I think
they are different because of different intent and different problems
that are being solved in practice.

Speaking only as a sound and light customer (and former
audiophile).  :-)

Mike K.

P.S. - I suppose things come together in a 3D-sonogram?  :-)


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