Positive Grid Positive Grid is a professional audio software and hardware best known for creating products like JamUp. Positive Grid is committed to creating and developing new technologies for the worlds musicians and engineers. Average User Rating 0 0 votes Please sign in to rate. Your Rating 0 Contact Phone Number: Unknown Address: Unknown Email: http://help.positivegrid.com/hc/en-us/requests/new Online: History History coming soon!