Masterpiece Master Control Switcher Family: SD, HD, 3G and 4K UHD Master Control Switchers Datasheet (DS-PUB-2-0986A-EN) File size: 1.4 MB, posted Apr 29 2021 Grass Valley has a rich history in helping media organizations deliver content on time, on budget and to the right audience across whatever distribution mechanisms are appropriate. Building on the success of the Masterpiece 12G-SDI and the Masterpiece IP, we are adding the Masterpiece HD/SD, which is a new market-defining master control switcher.