Bring together 2 grand pianos? What a funny idea! To make a duo of prepared pianos! The obviousness and simplicity of this duet was in the air. We seized it, the time of a week in the spring of 2014, without objective other than a meeting, ephemeral and confidential. We installed the pianos, we installed the microphones, it sounded ... and surprise, it sounds all on it's own! When replaying the recording, releasing an album seemed logical, essential.