+
Ardour's VBAP panner is currently in development, and its semantics may
- change in the near future, possibly affecting your mixes. Please do not
- rely on it for important production work while the dust settles.
+ change in the near future, possibly affecting mixes using it. It is advised not
+ to rely on it for important production work while the dust settles.
+ The Panner only works in fixed static mode, it does not support
+ automation playback.
VBAP @@ -13,7 +15,7 @@
- VBAP was developed by Ville Pulkki at Aalto University, Helsinki, in 2001. + VBAP was developed by Ville Pulkki at Aalto University, Helsinki, in 1997. It works by distributing the signal to the speakers nearest to the desired direction with appropriate weightings, aiming to create a maximally sharp phantom source by using as few speakers as possible: @@ -26,15 +28,15 @@
- 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.
+ Thus, if the panner is moved onto a speaker, only this speaker will get any
+ signal. This is handy when precise 1:1 routing is needed.
+
The drawback of VBAP is that a moving source will constantly change its - apparent sharpness, as it transitions between the three states mentioned - above. + apparent sharpness, as it transitions between the three states mentioned above.
- A horizontal VBAP panner has one parameter, the azimuth + An horizontal VBAP panner has one parameter, the azimuth angle. A full-sphere panner offers an additional elevation angle control.
@@ -47,6 +49,14 @@
+ Each VBAP panner is specific to its speaker layout—the panner has @@ -54,17 +64,24 @@ 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 - have N speakers distributed in a regular N-gon. That means that for - irregular layouts such as 5.1 or 7.1, the direction you dial in will - differ a bit from the actual auditory result, but you can still achieve - any desired spatialisation. + than two output channels (which implies stereo), it assumes that there are + N speakers distributed in a regular N-gon. That means that for + irregular layouts such as 5.1 or 7.1, the direction dialed in will + differ a bit from the actual auditory result, but any desired spatialisation + can still be achieved.
-
+
+
+ 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 @@ -72,11 +89,18 @@ "voice-of-god" speaker at the zenith.
-
+
+ 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 inputs are distributed symmetrically along the latitude around the panner direction. The width parameter controls the opening angle of the distribution sector.