Based on cycling over the Golden Gate Bridge, I have assembled a list of forces characteristic of the bridge, such as the fog moving over and under the deck, the rhythms of car traffic, the intense buffeting wind that one leans hard into while cycling, pelicans surfing air currents overhead, railings that sing, and fog beacons and horns sounding on the nearby headlands. Like refrains through these field recordings are stories and live performed compositions based on a ‘score’ crafted from forces observed at key points where fog and infrastractures meet, such as the narrows where the Pacific Ocean enters the San Francisco Bay. Similarly, tune in to listen to the radio as it carries across from the Pacific coast to inland Esch and beyond, bringing all manner of signal activity from foghorns, raven calls, coyotes, pedestrian signals, harbour communications, redwood forest and chaparral, sounds from the burn scar of summer fire, air-to-ground chatter, owl calls and the dry continuous flirtations of spring insects. A medium is not merely a conduit for moving content a medium might be understood in the multiple senses of conveyance, expression and cultivation. The fog is no more a container than radio is a cup to be filled with programming. As Etel Adnan also writes: “We believe in the uniqueness of these times as in the originality of this sky.” Without the fog, the land will be transformed to a more sere, harsh place. Yet as the climate crisis brings drought and wildfire to this area, the fog is also receding. Particularly during the summer months, the coast is deeply buried in daily fog. Ancient coastal Redwood trees grow only as as far as the fog rolls ashore, and in the absence of rain for many months of the year the fog is the only source of water. Existence here is shaped deeply by the marine layers and tule fogs that water the land and flow over and into its contours. A radiophonic day and night composed live from listening and responding to signals within the long slender fog zone between Santa Cruz and Jenner on the northern California coast.