(a) Extracted and freely colored figure of patent of Structures Sonores [2], parts of actual cristal Baschet are highlighted in color; (b) One of the first designs of cristal with vertical keyboard and bladders (from the ImageStudio © Royal Museums of Art and History of Bruxelles – Creative Commons CC BY – KMKG/RMAH/MRAH.); (c) cristal Baschet with piano soundboard (photography by Laszlo Ruszka provided by SSB association).