improved description using text from ITP and format the emacs mode's formatting

svn path=/trunk/externals/vbap/; revision=14456

1 files changed, 27 insertions, 25 deletions

diff --git a/debian/control b/debian/control
index 2a2e061..31995ea 100644
--- a/debian/control
+++ b/debian/control
@@ -17,29 +17,31 @@ Depends: ${shlibs:Depends},
 Recommends: pd-cyclone,
             pd-import
 Description: Pd library for Vector Base Amplitude Panning spatialization
- This is a library for Pure Data for sound spatialization using the
- vector base amplitude panning (VBAP) method.  VBAP is an amplitude
- panning method to position virtual sources in arbitrary 2-D or 3-D
- loudspeaker setups. In amplitude panning the same sound signal is
- applied to a number of loudspeakers with appropriate non-zero
- amplitudes. With 2-D setups VBAP is a reformulation of the existing
- pair-wise panning method. However, differing from earlier solutions
- it can be generalized for 3-D loudspeaker setups as a triplet-wise
- panning method. A sound signal is then applied to one, two, or three
- loudspeakers simultaneously. VBAP has certain advantages compared to
- earlier virtual source positioning methods in arbitrary
- layouts. Previous methods either used all loudspeakers to produce
- virtual sources, which results in some artefacts, or they used
- loudspeaker triplets with a non-generalizable 2-D user interface.
+ This a library for Pure Data that provides objects for realtime Vector Base
+ Amplitude Panning.  Vector Base Amplitude Panning (VBAP) is a method for
+ positioning virtual sources to arbitrary directions using a setup of multiple
+ loudspeakers. In VBAP the number of loudspeakers can be arbitrary, and they
+ can be positioned in an arbitrary 2-D or 3-D setups. VBAP produces virtual
+ sources that are as sharp as is possible with current loudspeaker
+ configuration and amplitude panning methods, since it uses at one time the
+ minimum number of loudspeakers needed, one, two, or three.
+ . 
+ With 2-D setups VBAP is a reformulation of the existing pair-wise panning
+ method. Different from other panning algorithms, VBAP can be generalized for
+ 3-D loudspeaker setups as a triplet-wise panning method. A sound signal is
+ then applied to one, two, or three loudspeakers simultaneously. VBAP has
+ certain advantages compared to earlier virtual source positioning methods in
+ arbitrary layouts. Previous methods either used all loudspeakers to produce
+ virtual sources, which results in some artefacts, or they used loudspeaker
+ triplets with a non-generalizable 2-D user interface.
  .
- The directional qualities of virtual sources generated with VBAP can
- be stated as follows. Directional coordinates used for this purpose
- are the angle between a position vector and the median plane (θcc),
- and the angle between a projection of a position vector to the median
- plane and frontal direction (Φcc). The perceived θcc direction of a
- virtual source coincides well with the VBAP panning direction when a
- loudspeaker set is near the median plane. When the loudspeaker set is
- moved towards a side of a listener, the perceived θcc direction is
- biased towards the median plane. The perceived Φcc direction of an
- amplitude-panned virtual source is individual and cannot be predicted
- with any panning law.
+ The directional qualities of virtual sources generated with VBAP can be
+ stated as follows. Directional coordinates used for this purpose are the
+ angle between a position vector and the median plane (θcc), and the angle
+ between a projection of a position vector to the median plane and frontal
+ direction (Φcc). The perceived θcc direction of a virtual source coincides
+ well with the VBAP panning direction when a loudspeaker set is near the
+ median plane. When the loudspeaker set is moved towards a side of a listener,
+ the perceived θcc direction is biased towards the median plane. The perceived
+ Φcc direction of an amplitude-panned virtual source is individual and cannot
+ be predicted with any panning law.