Howdy all,
Georg Holzmann wrote:
I would suggest you to use the vbap (vector based amplitude panning) external, which does exactly what you are trying to achive ...
The VBAP objects are great, except for one thing that is inherent in all vector-based systems: try to pan a sound directly from left to right through the middle of the loudspeaker circle you have defined. At a certain point (exactly the middle), the sound will audibly "flip over" from one side of the sound field to the other. This is a result of making a radical shift in the radiant of this circle, which is the basis for all measurements in a vector-based panning system.
For four-channel panning, at least, I've been much more satisfied with a quad-panning system based on a chain of stereo panners, going from front/back to front:left/right and back:left/right. For a four channel system, and when you want the sound to move within the bounds of the phsyical speaker locations (as opposed to using a direct sound vs. reverberated sound system to simulate sounds outside the bounds of the speaker locations), this has given the best results for me. Otherwise, I'd love to see a better implementation of VBAP that accounts for this "hole in the middle" problem.
best, derek