Techniques are described for delivering copies of digital media items to
consumers, such as to in some situations provide to a consumer a single
file with multiple distinct copies of a digital media item for use by
multiple distinct devices of the consumer, with each copy differing from
the others in one or more ways. Such single files may be of use, for
example, in situations in which consumers each have multiple devices
(e.g., of multiple distinct types, such as a personal computer, a
cellular telephone with capabilities to playback digital audio and/or
video items, other types of portable digital media presentation devices,
etc.) that the consumer desires to use as a playback or other
presentation device for digital media items (e.g., digital media items
downloaded or otherwise obtained from an online media store or other
provider of digital media items).