The
Future 1 : better spatial information
§Microphone arrays capable of synthesizing aribitrary directivity patterns
§Advanced
spatial analysis of the sound field employing spherical harmonics (Ambisonics - 1° order or higher)
§Loudspeaker
arrays capable of synthesizing arbitrary directivity patterns
§Generalized
solution in which both the directivities of the source and of the receiver are represented as a spherical harmonics expansion