Function once

once(
event: "dOut" | "dIn" | "dSErr" | "dev+" | "dev-",
listener: () => void,
): void
Register a listener that fires at most once for a system-level audio configuration event.
Parameters
- event: "dOut" | "dIn" | "dSErr" | "dev+" | "dev-"
  The event to listen for
- listener: () => void
  Called the next time a matching event occurs, then automatically removed
Returns void