An information processing apparatus comprising a file generation unit configured to generate an audio file comprising audio data of video content for at least one object, the audio data comprising audio data of a plurality of types, the file generation unit being configured to: allocate a plurality of audio tracks to the audio file, wherein one type of audio data from said plurality of types is arranged in each audio track, and wherein at least one audio track is allocated to the audio file for each of the plurality of types of audio data; and to further allocate to the audio file a base track including information about the audio data, wherein: the audio file is configured to include information indicating a reference relationship of the base track with one of the plurality of audio tracks; the plurality of types of audio data comprise Channel audio, Object audio, and HOA audio; Channel audio comprises audio data in units of channels, Object audio comprises audio in data in units of objects, and HOA audio comprises spherical audio data, wherein an object is a sound source; and the file generation unit is further configured to generate: an audio metafile associated with the audio file and comprising, for the at least one object, an object ID and object position information indicating a positional relationship between the at least one object and an origin; and a media presentation description file associated with the audio file and comprising image frame size information indicating a positional relationship between an image frame of the video content and the origin, to thereby enable detection of the position of each object on the image frame on the basis of the object position information and the image frame size information. allocate a plurality of audio tracks to the audio file, wherein one type of audio data from said plurality of types is arranged in each audio track, and wherein at least one audio track is allocated to the audio file for each of the plurality of types of audio data; and to further allocate to the audio file a base track including information about the audio data, wherein: the audio file is configured to include information indicating a reference relationship of the base track with one of the plurality of audio tracks; the plurality of types of audio data comprise Channel audio, Object audio, and HOA audio; Channel audio comprises audio data in units of channels, Object audio comprises audio in data in units of objects, and HOA audio comprises spherical audio data, wherein an object is a sound source; and the file generation unit is further configured to generate: an audio metafile associated with the audio file and comprising, for the at least one object, an object ID and object position information indicating a positional relationship between the at least one object and an origin; and a media presentation description file associated with the audio file and comprising image frame size information indicating a positional relationship between an image frame of the video content and the origin, to thereby enable detection of the position of each object on the image frame on the basis of the object position information and the image frame size information. the audio file is configured to include information indicating a reference relationship of the base track with one of the plurality of audio tracks; the plurality of types of audio data comprise Channel audio, Object audio, and HOA audio; Channel audio comprises audio data in units of channels, Object audio comprises audio in data in units of objects, and HOA audio comprises spherical audio data, wherein an object is a sound source; and the file generation unit is further configured to generate: an audio metafile associated with the audio file and comprising, for the at least one object, an object ID and object position information indicating a positional relationship between the at least one object and an origin; and a media presentation description file associated with the audio file and comprising image frame size information indicating a positional relationship between an image frame of the video content and the origin, to thereby enable detection of the position of each object on the image frame on the basis of the object position information and the image frame size information. an audio metafile associated with the audio file and comprising, for the at least one object, an object ID and object position information indicating a positional relationship between the at least one object and an origin; and a media presentation description file associated with the audio file and comprising image frame size information indicating a positional relationship between an image frame of the video content and the origin, to thereby enable detection of the position of each object on the image frame on the basis of the object position information and the image frame size information.