Exactly.

Strictly, much stereo one hears is a bit like that - a mixture of panpotted 
stereo, coincident mic, spaced mic, pseudostereo effects and even 
mono-stuck-in-a-speaker.

Dr. Peter Lennox

School of Technology,
Faculty of Arts, Design and Technology
University of Derby, UK
e: p.len...@derby.ac.uk 
t: 01332 593155


-----Original Message-----
From: sursound-boun...@music.vt.edu [mailto:sursound-boun...@music.vt.edu] On 
Behalf Of Eero Aro
Sent: 16 May 2013 14:56
To: sursound@music.vt.edu
Subject: Re: [Sursound] The commercial future of Ambisonics

Augustine Leudar wrote:
> However I'm not sure I agree that our hearing cant tell the difference 
> between whether a sound is coming from one or several speakers

I try to be more precise.

If you have a normal 5.1 speaker setup around you and you have several playback 
devices in your use, you can drive a mono sound to one of the speakers and the 
listener will locate the sound into the direction of that loudspeaker.

If you have a two channel stereo recording and you play it through the FL and 
FR speakers, the listener will hear a stereo image in front of him.

If you have a discrete 5.1 recording, you can play it back through the 5.1 
setup and the localization will work according to that.

If you have a B-Format recording, you can decode it for example to a horizontal 
layout and use the four "corner" speakers. Again, localization will occur as we 
know it does.

Now - you can hit Play on all of these players at the same time and the 
listener will hear a mix of your recordings regardless of their format of 
origin. 
This is
what I mean by that "the hearing doesn't know" about the reproduction system.

 From what you have written before, I have understood that the above is exactly 
what you have been doing, using discrete speakers for sharp imaging.

Some people think that you need to route _all of the sounds_ through the same 
decoder and that would reduce the localization of pinpointed phantom sources.
You don't need to do that, you can feed the amplifier of a certain loudspeaker 
from two or several playback sources.

Eero
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