Abstract: Embodiments involve harmonising one or more geographically or temporally distributed renditions with at least one backing clip, comprising a calibration module for selecting a parameter of one or more aural or visual characteristics of the first rendition, a backing clip selector in communication with a backing clip database, a reference selector for selecting reference clip for modification of the first rendition, a modification module for applying a computational process to the first rendition or the backing clip to modify an aural characteristic of the first rendition or the backing clip to reduce the difference between the first rendition or the backing clip and the reference clip in the aural characteristic, and a mixing module to combine one or multiple renditions with the backing clip after modification.