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Old 24th December 2003, 01:18   #255  |  Link
kempfand
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Join Date: Oct 2001
Location: Switzerland
Posts: 225
@daphy: Thanks for the initiative.

As a 1st contribution, I'm adding a newly designed bidule which uses the Panorama-VST. It's currently in the "/Ambisonic/upload"-directory, but you might want to sort it differently.

Some explanations:
Code:
I think it basically achieves the same as
the 'old' one.  Maybe it is slightly better, as it
processes internally as 2nd-order-B-format (within
Panorama), whereas B-Pan "only" does
1st-order-B-format processing.  I don't yet have
enough samples to really call this a "firm" statement,
so it's just a working assumption currently.

Some notes to the settings (see 2 attached JPG's for
illustration):

(1) Elevation:  I put that from 0 to 0.55 (L & R), to
tilt the soundfield slightly upwards by 33 degrees.
This is because my speakers are all very close to the
floor.

(2) Distance: I out that from 3.70 to 5.05 (L & R),
which slighy enlarges the size of the sound-sphere. If
enlarged too much, the VST calculates too much
reverberation for my taste.

(3) Azimuth:  For "L", set to +2.20, for "R" to -0.94.
  This only applies to when decoded to Pentagon.

For Square-decoding, it would be +1.57 for "L", and
-1.57 for "R".

Why the change (Square --> Pentagon) ?
  - "L": +1.57 --> +2.20
  - "R": -1.57 --> -0.94

Remember that we turned the soundfield
counter-clock-wise by 36 degrees, inorder to have it
correctly aliged to the 5.0 (or 5.1) speakers in people's
living-rooms.

We have to do the same here, i.e. rotate
counter-clockwise by 36 degrees, which corresponds to
an an increase of +0.63.  Meaning:
  - "L": +1.57 + 0.63 = +2.20
  - "R": -1.57 + 0.63 = -0.94
Comments & suggestions welcome here in the forum.

Happy Xmas to all
Andreas

P.S. joshbm: don't forget us ...
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