From d94369cd874ac65309d8e4f9de8b81125c66e27a Mon Sep 17 00:00:00 2001 From: Hans-Christoph Steiner Date: Sun, 21 Nov 2010 04:53:44 +0000 Subject: ported to library template and updated version to 1.0.3.1 to reflect bugfixes and doc updates svn path=/trunk/externals/vbap/; revision=14453 --- README.txt | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 README.txt (limited to 'README.txt') diff --git a/README.txt b/README.txt new file mode 100644 index 0000000..e42cbbc --- /dev/null +++ b/README.txt @@ -0,0 +1,32 @@ + +A Pd port of the VBAP object for Max/MSP by Ville Pulkki + +http://www.acoustics.hut.fi/research/cat/vbap/ + + 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. + + 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. + -- cgit v1.2.1