  Apparatus and methods are disclosed for performing object-based audio
rendering on a plurality of audio objects which define a sound scene, each
audio object comprising at least one audio signal and associated metadata. The
apparatus comprises: a plurality of renderers each capable of rendering one or
more of the audio objects to output rendered audio data; and object adapting
means for adapting one or more of the plurality of audio objects for a current
reproduction scenario, the object adapting means being configured to send the
adapted one or more audio objects to one or more of the plurality of renderers.
