X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fvbap-panner.html;h=6967d74aec4fa6b097408f6d9442b29ee49a42ac;hb=ca8c53473dfbcb7d4b483a5ce792bbf4b5caffe8;hp=ac6e6ddeb2951a78304720b7a88b7b737efb48c1;hpb=2098e011e638b5c86c56e68df7757975fc4d728f;p=ardour-manual diff --git a/include/vbap-panner.html b/include/vbap-panner.html index ac6e6dd..6967d74 100644 --- a/include/vbap-panner.html +++ b/include/vbap-panner.html @@ -5,7 +5,7 @@ rely on it for important production work while the dust settles.
- VBAP + VBAP is a versatile and straightforward method to pan a source around over an arbitrary number of speakers on a horizontal polygon or a 3D surface, even if the speaker layout is highly irregular. @@ -15,7 +15,7 @@
VBAP was developed by Ville Pulkki at Aalto University, Helsinki, in 2001. It works by distributing the signal to the speakers nearest to the desired - direction with appropriate weightings, aiming to create a maximally sharp + direction with appropriate weightings, aiming to create a maximally sharp phantom source by using as few speakers as possible:
Thus, if you move the panner onto a speaker, you can be sure that only
this speaker will get any signal. This is handy when you need precise
- 1:1 routing.
- The drawback of VBAP is that a moving source will constantly change its
- apparent sharpness, as it transitions between the three states mentioned
+ 1:1 routing.
+ The drawback of VBAP is that a moving source will constantly change its
+ apparent sharpness, as it transitions between the three states mentioned
above.
A horizontal VBAP panner has one parameter, the azimuth - angle. A full-sphere panner offers an additional + angle. A full-sphere panner offers an additional elevation angle control.
More elaborate implementations of VBAP also include a - spread parameter, which will distribute the signal over a - greater number of speakers in order to maintain constant (but no longer - maximal) sharpness, regardless of position. Ardour's VBAP panner does not + spread parameter, which will distribute the signal over a + greater number of speakers in order to maintain constant (but no longer + maximal) sharpness, regardless of position. Ardour's VBAP panner does not currently include this feature.
- Each VBAP panner is specific to its speaker layout - — the panner has + Each VBAP panner is specific to its speaker layout—the + panner has to "know" about the precise location of all the speakers. A complete VBAP implementation must therefore include the possibility to define this layout.
- +Ardour currently uses a simplified approach: if a track or bus has more than two output channels (which implies stereo), it assumes that you @@ -65,8 +64,7 @@ panner with 5 outputs"/> any desired spatialisation.
For tracks with 10 outputs, Ardour will currently assume a 3-dimensional speaker layout corresponding to Auro-3D 10.1, which is a horizontal 5.1 @@ -75,12 +73,10 @@ panner with 10 outputs, in experimental 3D mode"/>
For tracks and busses with more than one input, Ardour will (for now) assume that you wish to distribute the inputs symmetrically along the latitude around the panner direction. The width parameter controls the opening angle of the distribution sector.
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