| Artist name | Roles | Recordings |
|---|---|---|
| May Day (Swiss rock band) | ||
| Willy Astor |
| Artist name | Roles | Recordings |
|---|---|---|
| May Day (Swiss rock band) | ||
| Willy Astor |
| Artist name | Roles | Recordings |
|---|---|---|
| May Day | mix | Alli dia Johr, Insieme, Lass mi go, Nelka, Neuia Tag, Nur as Märli (?), Rosalie, Südwärts, Tubel im Umzug, Wach uf, Z'globta Land |
| Willy Astor | bass | El Cafe |