X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fvbap-panner.html;h=909ded59b44f69ca30eb37c0dc1f71387b91cd10;hb=081e7af0b6f6dec0ca685d3a538eacf20394c2cc;hp=ac6e6ddeb2951a78304720b7a88b7b737efb48c1;hpb=2098e011e638b5c86c56e68df7757975fc4d728f;p=ardour-manual diff --git a/include/vbap-panner.html b/include/vbap-panner.html index ac6e6dd..909ded5 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 @@ -75,8 +73,7 @@ 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