FARTEIN VALEN: A CATALOGUE OF THE ORCHESTRAL MUSIC
1911: Psalm 121 for choir and orchestra
1915-21:Ave Maria for soprano and orchestra, op.4 + (Simax cd)
1925-27:Two Chinese Songs for soprano and orchestra, op.8 + (Simax cd)
1927: "Mignon"-Two Songs of Goethe for soprano and orchestra, op.7: 6 minutes + (Simax cd)
1927-29:"Darest Thou now, o soul" for voice and orchestra, op.9 + (Simax cd)
1929-30:Pastorale for orchestra, op.11: 3 minutes + (BIS cd)
1931-32:"Sonetto di Michelangelo" for orchestra, op.17, 1: 5 minutes + (BIS cd)
1932-33:"Cantico di Ringraziamento" for orchestra, op.17, 2: 8 minutes + (BIS cd)
"Nenia" for orchestra, op.18, 1: 4 minutes + (BIS cd)
1933: "An die Hoffnung" for orchestra, op.18, 2: 5 minutes + (BIS cd)
"Epithalamion" for orchestra, op.19: 6 minutes + (BIS cd)
1933-34:Symphonic Poem "The Chuchyard by the Sea", op.20: 10 minutes + (BIS and Naxos cds)
1934: "La Isla de las Calmas" for orchestra, op.21: 4 minutes + (BIS cd)
1937-39:Symphony No.1, op.30: 26 minutes + (Simax and BIS cds)
1939: "Die dunkle Nacht der Seele" for soprano and orchestra, op. 32 + (Simax cd)
Ode to Solitude for orchestra, op.35: 6 minutes + (BIS cd)
1940: Violin Concerto, op. 37: 13 minutes + (BIS and Simax cds)
1941-44:Symphony No.2, op.40: 23 minutes + (Simax and BIS cds)
1944-46:Symphony No.3, op. 41: 20 minutes + (Simax and BIS cds)
1947-49:Symphony No.4, op.43: 17 minutes + (Simax and BIS cds)
1949-50:Piano Concerto, op. 44: 8 minutes + (BIS cd)
I see from Worldcat that his Opus 7 is Mignon (1920-27), a pair of poems after Goethe for Soprano and Orchestra (published by Norsk Notestik & Forlag but I'm not sure when). I'm not sure if we're including works with vocal / choral parts (so long as the accompaniment is orchestral, that is), also op.8 "Zwei Chinesische Gedichte for soprano and orchestra" (1925-27). Psalm 121 may be from around 1911 and (like the piano sonata no.1) is sometimes given opus 2.
Thank you, Eric :)