New musical interfaces have been a major focus of the research and creative community for the past 15 years. With new technologies and accessibility of microcomputers, microcontrollers and components there has been a surge in the field, which once was only navigable with engineering degrees at the beginning of the 20th century. “Interfaces for Expressive Diversity” is a set of research work that looks at cutting edge new electronic instruments: highly expressive and intuitive. The research focuses on the practicalities and musicality of traditional instruments while giving the flexibility and sonic possibilities afforded by technology. The result is the creation of highly expressive and intuitive, these are contributing to a changing concept of musicality and musical interfaces.