Tobias was credited as a producer (with Christophe Beck and Whedon) and with arranging the music (with Beck) for "Once More, with Feeling", the musical episode from Whedon's show's sixth season.
The score is by composer Christophe Beck and Gullord does also contribute with her own improvisations.
Beck | Jeff Beck | Glenn Beck | Glenn Beck Program | József Beck | Martin Beck | Gordon Beck | Jerry Beck | Christophe Rousset | Christophe Lamaison | Christophe Barratier | Beck's Brewery | William F. Beck | The Jeff Beck Group | Saint-Christophe | Kurt Beck | Joe Beck | Haweswater Beck | Frederick Louis, Duke of Schleswig-Holstein-Sonderburg-Beck | Dave Beck | Christopher Beck | Christophe Lévêque | Christophe Bourseiller | Aaron T. Beck | Volker Beck | Ulrich Beck | Thavius Beck | Simone Beck | Robin Beck | Perry Van der Beck |