We perceive the world through all our senses simultaneously and very often two senses deliver corresponding information. For example when we hear a high tone we might associate with it an object that is relatively small, light, fast, but also -- interestingly bright rather than dark. Many of these correspondences are learned but some may be innate. In my research I examine the ability to transmit through music (improvisations) non musical dimensions such as size, brightness, and sharpness. What do improvisers do to give the sense of darkness or size? Is it easier to communicate sharpness rather than size? Do they all use the same musical elements or "devices"? Can we figure out which constellation of musical characteristics best communicates each of these dimensions?