gain_i = Σ_mn B_mn * Y_mn(l_i) with optional or basic energy preservation for in-phase rendering. 2.2. Microphone Array Processing Eigenmike (em32) → Ambisonics up to 3rd order: Uses pseudo-inverse of spherical harmonic matrix sampled at capsule positions.
– For loudspeakers at directions l_i : ears audio toolkit
– For a plane wave from direction (θ, φ) with signal s(t) : gain_i = Σ_mn B_mn * Y_mn(l_i) with optional