Apparatus, method or computer program for generating a sound field description

A method of generating a sound field description comprising a representation of sound field components, comprising:

• determining one or more sound directions for each time-frequency tile of a plurality of time-frequency tiles of a plurality of microphone signals;
• evaluating, for each time-frequency tile of the plurality of time-frequency tiles, one or more spatial basis functions using the one or more sound directions;
• and
• calculating, for each time-frequency tile of the plurality of time-frequency tiles, one or more sound field components corresponding to the one or more spatial basis functions using the one or more spatial basis functions evaluated using the one or more sound directions and using a reference signal for a corresponding time-frequency tile, the reference signal being derived from one or more microphone signals of the plurality of microphone signals.

A non-transitory digital storage medium having a computer program stored thereon to perform the method of generating a sound field description comprising a representation of sound field components, comprising:

• determining one or more sound directions for each time-frequency tile of a plurality of time-frequency tiles of a plurality of microphone signals;
• evaluating, for each time-frequency tile of the plurality of time-frequency tiles, one or more spatial basis functions using the one or more sound directions;
• and
• calculating, for each time-frequency tile of the plurality of time-frequency tiles, one or more sound field components corresponding to the one or more spatial basis functions using the one or more spatial basis functions evaluated using the one or more sound directions and using a reference signal for a corresponding time-frequency tile, the reference signal being derived from one or more microphone signals of the plurality of microphone signals,
• when said computer program is run by a computer.