Kelli Cain and Brian Crabtree are celebrating the 20th anniversary of their monome company and project this week. For anyone moved by their creations over the years, there will be no escape from the feels in this gallery — and, of course, I couldn’t resist adding some extra memories from that era. If I had to pick just one project to sum up the last couple of decades of writing for this site, it’d be hard to top the monome. Everything the monome crew did was at the nexus of so many other ideas: physical interaction with digital music, open-source and community-based development, user customization via patching, discussions about scale and sustainability … and the iconic grid of their best-known tool, which came to embody a whole epoch of music-making. And the fact that it was a small, humble project, that we all got to know Brian and Kelli and each member of the community — that’s kind of the point.…