The first meetings of a sound design project aim to present the request which may concern the identity of a brand or the sound of a new product. It is then crucial to elaborate recommendations for the sound designer. However, the major difficulty encountered is to specify the request in terms of sound features. The Speak methodology is based on an efficient co-design workshop to help participants to specify their request with words related to sound features. This methodology is based on a lexicon composed of 35 words often used by professionals to described sound features. Each word is related to a sound feature explained by a definition and highlighted by a corpus of sound examples, and is associated with a card used by the participants during the brief meeting. Using this methodology, participants are actively involved in the process to develop sound recommendations.