In this example, “F” is the first person to speak.  “R” is the second person to speak.  Blue audio clips (A2, A3, A6, A7) were recorded by the camera for waveform synchronization.  “B12” (A4, A8) denotes a boom mic with an average target loudness of -12 dBFS (or -23 LUFS).  “B06” (A5, A8) indicates a safety track recorded with an average target loudness of -18dBFS (six decibels quieter than B12).  “DX” (professional shorthand for “dialogue”) is an audio submix track.