In Play MPE v8 multiple track assets (formerly "bundles") are uploaded separately from singles.
The overall playlist asset requires its own set of metadata just like an album has its own artist and title.
Note: Artist, Title and Owner are required fields.
Also by default, if no metadata is filled for each track, the Artist and
Title of the overall playlist asset will be applied to the track. This
is useful in the case of multiple version releases.
Each track can have its own metadata. To edit a track's metadata, click on the track in its uploading window.
To the right, the Track Information for that track will open. You can edit these fields while the track is processing.
Note: Also by default, if no metadata is filled for
each track, the Artist and Title of the overall playlist asset will be
applied to the track. This is useful in the case of multiple version
releases.
When you have finished uploading and editing the asset, click the OK button at the bottom right.