Lots of comments burried in the 10 vs 12 AWG thread about sound stage.
Some of them are even correct.

Using just panning, a mixing engineer can place a single track (usually
an instrument/vocal) anywhere they want from 100% left to middle to 100%
right. This is easy.

With mini-monitors such as the BBC LS3/5a or my Sonus Faber Concertos,
it is fairly easy to reproduce a sound stage that is wider than the
speakers are apart. Its all done with phase manipulation.

Back in the late 60s and early 70s, lots of the grasshead albums played
a lot with phase effects to make sounds fly around the room. Check out
Moody Blues or Emmerson Lake and Palmer.

In the mid-90s Creative Labs (the Soundblaster folks) had a driver for
windows that did an impressive job of making sounds move arround the
user sitting in from of the computer monitor, using just two computer
speakers. It even did a credible 'behind the user' effect.

You push a track to the edge (right or left) using just normal signal.
You can push it past the edge by feeding in negative phase from the
opposite speaker.

In acoustic music, good ORTF or even spaced omnis can record this
naturally from the space. Listen to some Anonymous Four, recorded in
some English churches for clear examples.


-- 
Pat Farrell         PRC recording studio
http://www.pfarrell.com/PRC

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