Lebedev Decoder
This tool decodes an Ambisonic sound scene up to a maximal degree $L \leq \{1, 2, 3, 5\}$, on a $N$-node Lebedev grid with $N \in \{6, 14, 26, 50\}$1 (see grids.lib). The Near Field Compensation (NFC) filters are included (see radial.lib).
Compilation parameters
L: maximal Spherical Harmonics degree (i.e., Ambisonics order), $0 \leq L \leq 5$,N: number of node for the Lebedev grid, $N \in \{6, 14, 26, 50\}$,rspk: array radius (m) for NFC $r_\text{spk} \in ]0, \infty[$.nfcon: activate or not NFC:0for no NFC,1for NFC.
In order to avoid spatial aliasing artifacts in the sweep spot, please respect the Tab. in grids.lib when setting $L$ with respect to $N$.
Inputs / Outputs
- Inputs: $(L+1)^2$
- Outputs: $N$
User Interface
| Element | OSC | Min value | Max value |
|---|---|---|---|
| Outputs level (dB) | levelout |
-10 | 10 |
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P. Lecomte, P.-A. Gauthier, C. Langrenne, A. Berry, et A. Garcia, « A Fifty-Node Lebedev Grid and Its Applications to Ambisonics », Journal of the Audio Engineering Society, vol. 64, nᵒ 11, p. 868‑881, 2016. ↩