Download feat.初音ミク is a compilation album by Warner Music Japan. It has 16 tracks, written by various producers, featuring previous favorites, new arrangements and newly written songs. The theme song is called Connecting, it was written by halyosy and features all of Crypton's Vocaloids.
The official website can be found here. A trailer was uploaded to Niconico Douga and YouTube on October 17, 2014 and a second one was uploaded to Niconico Douga and YouTube on November 8, 2014. The album's crossfade was also uploaded to Niconico Douga and YouTube on November 25, 2014.
Upload feat.Vocalist, an Utaite version of this album, is also being released simultanously. It features most tracks sang by Utaite instead, with a few tracks being exclusive to Download feat.初音ミク and others to Upload feat. Vocalist.