The descriptor formatChannelConfiguration is designed to indicate the arrangement or configuration of specific channels or layers of information within a media item's tracks. Examples are 2-track mono, 8 track stereo, or video track with alpha channel.
Use free-form text entry. Whereas the descriptor formatTracks identifies the number and kind of tracks present in a media item (digital or analog), formatChannelConfiguration delves deeper by describing other configuration information specific to the tracks identified in formatTracks. Where it is important to share this information, indicate specific arrangements of layers or channels within a track.
Apply once within its container, pbcoreInstantiation (which itself can be applied multiple times for each rendition of a media item)