| Code | Title | Time | Year | City, Country | Price | Instrument |
| 10.01 | Duo obs: work commissioned by Sonia Born and Georg Scheuermann |
6’00 | 26-06-1987 | €20.00 | female voice, viola | |
| 10.02 | Fischer, Der obs: work commissioned by the Tenor Aldo Baldin; trsc. 11.04; lyrics by Goethe; translation "The Fisherman" |
6’00 | 26-06-1984 | Baden-Baden, Germany | €20.00 | middle voice, organ |