Conditional disabling of a reverberator

An apparatus for assisting spatial rendering in at least two acoustic environments, the apparatus comprising means configured to: obtain information associated with a number of reverberators before determining a subset of said reverberators which are to be initialized. At least one configuration parameter for at least one of the set of reverberator is determined before initializing the set of reverberators based on said configuration parameter. An audio signal is then processed with the initialized set of reverberators to generate late reverberation during rendering of the processed at least one audio signal. In a main embodiment, each acoustic environment comprises a respective reverberator, where each reverberator is selectively activated or deactivated based on a priority level. Such priority levels may be based upon distance, audibility and level of reverberation associated with each acoustic environment.