This paper describes a reverberation architecture implemented within the signal chain of a periphonic HOA (High Order Ambisonics) audio stream. An HOA signal (3rd order in the example implementation) representing the dry source signal is decoded into an array of virtual sources uniformly distributed within the reverberant space being simulated. These virtual sources are convolved with independent, decorrelated impulse responses, optionally tailored to model spatial variations of the simulated reverberation. The output of each convolver is then encoded back into High Order Ambisonics and mixed with the original Ambisonics dry signal. The result is a convolution reverberation engine with a HOA input that outputs HOA and maintains the spatial characteristics of the input signal.
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