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Syncing Pre-Recorded Audio Description to a Live Musical Theater Performance Using a Reference Audio Recording

Audio description, an accessibility service used by blind or visually impaired individuals, provides spoken descriptions of visual content. This accommodation allows those with low or no vision the ability to access information that sighted people obtain visually. A method for deploying pre-recorded audio description in a live musical theater environment is presented here. This method uses a reference audio recording and an online time warping algorithm to automatically align audio description with repeated live performances of a theatrical production. This system is used in two evaluation experiments that show the method successfully aligns multiple recordings of works of musical theater in order to automatically trigger pre-recorded, descriptive audio in real time.