Bitstream representing audio in environment

A (encoding) apparatus includes a metadata generator (203) that generates metadata of audio data of a plurality of audio elements, the plurality of audio elements representing an audio source in an environment. The metadata includes acoustic environment data of the environment in which the acoustic environment data describes a property that affects sound propagation of the audio source in the environment. At least some of the acoustic environment data may be applicable to a plurality of listening gestures in the environment, and the properties include both static and dynamic properties. A bitstream generator (205) generates a bitstream to include the metadata, and generally further including audio data representing the audio elements of the audio source in the environment. A decoding device may include a receiver to receive the bitstream and a renderer to render audio of the audio environment based on the acoustic environment data and based on audio data of the audio elements. 一种(编码)装置，包括元数据生成器(203)，所述元数据生成器(