[2] Greta described the song as a "mixture of indie/contemporary folk pop, mixed with symphonic elements and then a dance beat, which makes it into an exciting fusion.

[5] The Eurovision version of "Hear Them Calling" was released on 18 March 2016, with the music made to feel more dramatic, according to Greta.

[3] Söngvakeppnin 2016 was the national final format developed by RÚV in order to select Iceland's entry for the Eurovision Song Contest 2016.

[9] On 25 January 2016, a special allocation draw was held which placed each country into one of the two semi-finals, as well as which half of the show they would perform in.

[11] The performance featured Greta in a long, black leather suit interacting with an LED screen behind her, with her controlling images of hands, birds, and people.

[2] In December 2020 the EurovisionAgain online series, endorsed by the EBU, held a contest for the best song eliminated in the semi-finals, and "Hear Them calling" won the vote.