Duets with or without Piano
| Title | Composer(s) | Scoring |
| Duettino | Hans van Eck | 2 violins |
| Canto 7 | Norbert Wissing | violin and piano |
| Sonate | Hans van Eck | violoncello and piano |
| Sonate | Norbert Wissing | violoncello and piano |
| Little Poem | Hans van Eck | flute and piano |
| Study | Hans van Eck | bassclarinet and piano |
| Sonate Musica 2 | Norbert Wissing | bassoon and piano |
| Quartuor Sermones | Hans van Eck | 2 Flutes |
| Musica per Soprano e Percussione | Norbert Wissing | soprano and percussion |
| "For the Goodbye" | Hans van Eck | saxophone (soprano, alto), accordion |
| Musica per oboe d'amore e arpa | Norbert Wissing | oboe d'amore, harp |
| Musica no. 7 | Norbert Wissing | violin and soprano |
