Alessandro Cortini is serious about his synthesizers. His studio is packed wall to wall with the vintage, the rare, and the arcane: towering modular rigs, vacuum-tube drum machines, obsolete-looking computer monitors, not to mention a bevy of coveted devices from every maker under the sun. When Cortini moved from Los Angeles to Berlin a few years ago, he affixed a GPS tracker to the shipping container carrying his gear, just so he could keep tabs on his precious cargo. Who knows what he would have done had the ship gone down in a storm; commissioned a team of salvage divers, perhaps.