diff --git a/internal/audio/recorder.go b/internal/audio/recorder.go
index ff92dd7..fc9df32 100644
--- a/internal/audio/recorder.go
+++ b/internal/audio/recorder.go
@@ -204,6 +204,18 @@ func (r *Recorder) Start(fromDev, micDev string, prerollSec int) error {
 		}()
 	}
 
+	// Name the devices being recorded FROM, once, at the start.
+	//
+	// A station with two radios has two sets of endpoints, and the recorder will
+	// happily capture the one that is not being listened to: the result is a
+	// file full of hiss with no relation to what the operator hears, and nothing
+	// anywhere said which receiver it came from.
+	if twoSrc {
+		LogSink("recorder: capturing %q + %q", DeviceName(fromDev), DeviceName(micDev))
+	} else {
+		LogSink("recorder: capturing %q", DeviceName(fromDev))
+	}
+
 	// Watchdog. A WASAPI device can open cleanly and then produce nothing at
 	// all — a DAX channel with no stream behind it does exactly that, and it is
 	// indistinguishable from silence until the recording turns out to be empty