If you bought the book new, contact Hachette customer service with a photo of the book and proof of purchase. If you bought it used, you will likely need to purchase a separate "clé d'activation" (activation key) from their website for €5-€10.
: Users can access all workbook audio and video material through the Parcours Digital Cosmopolite 1 A1- Cahier d-activites -Audio-
Cosmopolite_1_A1_Cahier_activites/ ├── Audio/ │ ├── Lecon_0/ │ ├── Dossier_1/ │ ├── Dossier_2/ │ ├── ... │ └── Phonetique/ └── Cahier_activites.pdf If you bought the book new, contact Hachette
ehachettefle.com/en/US/products/9782016287569">Hachette FLE Cosmopolite Series for your curriculum? Cosmopolite 1 A1 : Cahier d'activités+ CD audio - Sedia If you bought the book new