The next Compline may seem a far cry from the 250-person cathedral event of August 13. My colleague and friend, Daniel Scarozza, and I biked around two parks recently scouting out some non-church venues for Gregorian Chants.  In Fort Tryon Park (home to The Cloisters), there's a pedestrian tunnel just off the main path to the museum that has about 2-3 seconds of reverb.  Notably, the tunnel acts as a megaphone for the nearby promenade/overlook point that has a beautiful view of the Hudson River Valley.