Directional Dirac Filtering
This tools performs a directional filtering of the Ambisonic sound scene as follows: only one direction $(\theta, \phi)$ is retained in the output sound scene1. Therefore, it is possible to point and listen to only one direction at the run time. A focus slider is available to manage the ratio between original and filtered sound scene.
Compilation parameters
L: maximal Spherical Harmonics degree (i.e., Ambisonics order, $L > 0$)
Inputs / Outputs
- Inputs: $(L+1)^2$
- Outputs: $(L+1)^2$
User Interface
| Element | OSC | Min value | Max value |
|---|---|---|---|
| Azimuth ($\theta^\circ$) | theta |
-180 | 180 |
| Elevation ($\phi^\circ$) | phi |
-90 | 90 |
| Focus (%) | focus |
0 (effect is bypassed) | 100 |
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P. Lecomte, P.-A. Gauthier, A. Berry, A. Garcia, et C. Langrenne, « Directional filtering of Ambisonic sound scenes », in Audio Engineering Society Conference: Spatial Reproduction, Tokyo, 2018, p. 1‑9. ↩
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