Lárus began studying the flute in the Skólahljómsveit Vesturbæjar children's wind band and music school in Western Reykjavík (now Skólahljómsveit Vesturbæjar og Miðbæjar) when he was ten. He attended the Reykjavík College of Music from 1972 to 1977.
Lárus started learning to play the flute in a children's wind band and music school in Western Reykjavík when he was ten. From 1972 to 1977, he studied at the Reykjavík College of Music.