This report summarizes the outcomes of a Dagstuhl Seminar that brought together international experts from the data visualization and data sonification communities. The seminar aimed to bridge these two fields by exploring their complementary potential in enhancing human-data interactions. Over five days, participants engaged in discussions, inspiration sessions, and presentations focused on nine key topics, including design theory, application examples, perception, interaction, and evaluation of integrated visualization and sonification. The seminar facilitated a collaborative environment in which both communities shared knowledge, identified common challenges, and began defining a novel field that combines visual and auditory data representation. The event marked a significant step towards establishing a common ground between these disciplines, with the goal of improving data analysis and presentation in an increasingly data-driven world.