2.  Digipak is a patented style of CD, DVD or BD
packaging
 Digipaks typically consist of a gatefold (book-style)
paperboard or card stock outer binding, with one or
more plastic trays capable of holding
 Since Digipaks were among the first alternatives to
jewel cases to be used by major record
companies, and because there is no other common
name for Digipak-style packaging made by other
companies, the term digipak or Digi-Pak is often used
generically, even when the media holder is a hub or
"Soft Spot" rather than a full plastic tray. a CD or DVD
attached to the inside.

3.  An album cover is the front of the packaging of
a commercially released audio recording
product, or album.
 The term can refer to either the printed
cardboard covers typically used to package sets
of 10 in (25 cm) and 12 in (30 cm) 78 rpm
records, single and sets of 12" LPs, sets of 45
rpm records (either in several connected sleeves
or a box), or the front-facing panel of a CD
package, and, increasingly, the primary image
accompanying a digital download of the
album, or of its individual tracks.