The one audio representation of the track's dash_manifest: its id, its BaseURL and the
SegmentBase ranges. The app downloads this BaseURL, not progressive_download_url
(the app's GETs carry the manifest's URL, whose query differs from the progressive one).
The one audio representation of the track's
dash_manifest: its id, itsBaseURLand theSegmentBaseranges. The app downloads thisBaseURL, notprogressive_download_url(the app's GETs carry the manifest's URL, whose query differs from the progressive one).