Browsing by Subject "Audio synchronization"
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Item Synchronization of audio tracks with acoustic markers(2021-05-07) Sung, Kyle Chi; Julien, Christine, D. Sc.; Garg, Vijay KSynchronization of audio tracks from different sources to a common audio track is an important step in compiling virtual performances. The process is commonly performed manually because of the variables present in different recording settings. An automatic process using only audio markers present in the recorded audio tracks would have the least assumptions on the equipment setups and the audio content. This report explores two methods of automatic synchronization with audio markers - the “earphone method” in which the singer listens to the audio markers through earphones, and only the vocal audio is recorded; and the “loudspeaker method” where the audio markers are played in a loudspeaker in the same place as the singer, and the recording contains both the vocal and piano components. The earphone method produces an audio mix with good quality, but misalignments can happen from singer mistakes and timing shift; the loudspeaker method is more resilient to those problems, but the quality of the resulting mix is inferior, and the audio markers could be distracting to the singers. Both methods can simplify the recording process of virtual choirs and other online music projects.