The sound-driven design approach foregrounds the human-centred sonic, experiential and cultural aspects of listening. However, addressing the temporal and context-dependent nature of sound in multi-stakeholder, collaborative design projects is a challenging activity. Ideation methods are used to generate solutions to a design problem. During idea generation, participants use their creative cognition to generate ideas in quantity, quality, variety, and originality. If this collaboration is managed effectively, a group outperforms its members. We present Soundstorm, a collaborative card game to sensitise group-work in sound-driven generative design sessions. A pilot evaluation using a protocol study with 18 participants showed the potential of Soundstorm in facilitating iteration among team members. The study highlights the importance of putting effort and attention into preparing participants for productive generative sessions.@en