| 摘要 |
<p>Apparatus is configured to: for each of multiple segments of a timeline for which at least two time-overlapping audio recordings exist, calculate an ambience factor for each of the overlapping audio recordings for the segment. For each of the multiple segments of the timeline, the ambience factors calculated for the overlapping audio recordings are used to select an audio type for the segment. A composition signal for the timeline is then created, the composition signal having for each segment the audio type that is selected for the segment. The audio type may be indicative of a number of audio channels, i.e. monophonic, stereophonic or surround sound, and different segments may have different audio types. Low quality audio recordings may be identified and disregarded when using the calculated ambience factors. Audio types may be determined by ascertaining whether an ambience factor exceeds a threshold. The composition signal may be created by mixing multiple audio recordings, by selecting one of the multiple audio recordings or by down-mixing one or more of the audio recordings. A sound image direction may be calculated for an audio recording of a stereo or spatial type.</p> |
