Engineering a Sub-Second Broadcast Failover That Actually Holds Up at 02:00 AM
By the KAVANA engineering team — June 2026
There is a particular kind of silence that broadcast engineers dread. It is not the silence of dead air — you can hear that immediately. It is the silence of a station that is technically on air, outputting carrier, but playing nothing useful: no audio, a stuck frame, a repeated clip from forty minutes ago. That silence can last a long time if nobody catches it. At 02:00 AM at a county-level station with no overnight operator, it can last until the morning shift arrives at 06:00.
We have been on the receiving end of those phone calls. This post explains what we built to stop getting them, and why the engineering choices we made are less obvious than they might appear.
The Industry Baseline and Why It Was Not Good Enough
