Irgens-Jensen studied piano with Nils Larsen while a philology student at the University of Oslo.
In 1930, the composer achieved another great success with his choral symphonic work Heimferd, written to commemorate the 900th anniversary of the death of St. Olav II of Norway.
Initially, he was heavily influenced by French Impressionism and experimented with atonality in his early songs.
His music was perceived as "old Norwegian" in his homeland due to its polyphonic writing and preference for modal turns in their harmony.
His song cycle Japanischer Frühling (Japanese Spring) is regularly programmed in Scandinavia.