A sophisticated translation method was developed that connects architecture and music. The derived translation method parallels the parameters of a building affecting its connection with the urban environment, with the musical characteristics of a chord affecting its harmonized connection with the rest of the musical piece. Every chord represents a building. An extra note of the chord appears if there is a roof. The elements added to a building (windows, doors, balconies) create the melody that decorates every chord. Subsequently, this paper develops a multimodal interactive tool called "MusiCityX" implemented in Unity 3D that connects music with architecture integrating the translation method devised between musical and architectural elements. The MusiCityX platform is divided into four parts. In the first part, users build the road network of the urban scenery. In the second part, they can create buildings and add elements such as windows, balconies, and doors in 3D. In the third part, the users select the urban path to be translated to music. In the fourth part, they listen to the musical piece created.