At 17:26 05-12-15, Stefan Schreiber wrote:
See:
http://www.hauptmikrofon.de/HW/TMT2012_3DNaturalRecording_Theile_Wittek_2012_11.pdf,
An interesting paper, which I shall read fully. But it says already on page 1:
"5.1 .... increased the listening area and
improved the stability and quality of stereo
sound by subdividing the L/R basis, which is 60°
in width, into two stereo sub-ranges with 30° each (L/C and C/R)."
This, as we discussed recently, is demonstrably
not true, inasmuch as makers of 5.1 recordings do
not use the three front channels in this way. At
least, I do not have a 5.1 recording of acoustic
music that does so effectively.
I have experimented with playing back three
channel Mercury recording of Stravinsky's
Firebird (LSO/Dorati) from SACD using three front
loudpeakers and also played stereo using three
loudspeakers, matrixing level and phase of the
original channels as indicated in two of the
Gerzon papers (I forget which for the moment). I
was very impressed with the results, and it works
better if the L/R speakers are at +/- 45 degrees,
although that demands a large room. The speakers
need to be matched, which is another problem with
the usual 5.1 playback systems: they use an inferior speaker in the middle.
David
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