A tribute is a song or album created in honor of a group. It need not be a cover or a remix, and it need not even sound like the group being given tribute. Tributes are made to acknowledge a group's greatness. A melody sample is a copy of a song's main theme. Melody samples are rare.
Instrument samples are the most common kind.
They duplicate the distinctive raw sound of a group's instruments, or even whole sections of the group's songs. Instrument samples can also be taken from other sources like nature or movies. Here I'm looking specifically at samples of Kraftwerk sounds, whether recorded or simulated. Sometimes it can be hard to say for sure that an instrument was sampled from a specific group, so some of the information in this section is best taken with a salt lick. This includes mentions of Kraftwerk by other groups and in other entertainment media.