| Artist name | Roles | Recordings |
|---|---|---|
| Guizmo (Cyril Célestin, member of Tryo) | performer | Pleure (feat. Guizmo) |
| Sally Nyolo | performer | Terres vertes unies vertes (feat. Sally Nyolo) |
| Artist name | Roles | Recordings |
|---|---|---|
| Alan Stivell | electric guitar | Ian Morrisson Reel, Spered hollvedell |
| Carlos Núñez | electric guitar | Os Amores Libres |
| Loreena McKennitt | acoustic guitar | Good King Wenceslas |