Apparatus, method for generating sound field description from signal comprising at least one sound channel

An apparatus for generating a sound field description from an input signal comprising one or more channels, comprising an input signal analyzer for obtaining diffusivity data from the input signal; a sound component generator for generating one or more sound field components of a first set of sound field components from an input signal, the first set of sound field components having a direct component and a diffusion component for each sound field component, and for generating a second set of sound field components from the input signal, the second set of sound field components having only the direct component and the diffusion component for each sound field component. Wherein the sound component generator is configured to perform energy compensation when generating the first set of sound field components, the energy compensation depending on the diffusivity data and at least one of a number of diffusive components in the first set of sound field components and a maximum order of sound field components of the