Eac3EncodeConfiguration E-AC-3 (Dolby Digital Plus). As AC-3, plus the bitstream mode (bsmod). Field Type Repeated Description sample_rate SampleRate backend DolbyDigitalEncoderBackend bsmod int32 Bitstream mode (bsmod): 0 = main/complete; others per ETSI TS 102 366. Member of Message Description AudioEncodeConfiguration DropRandom Easing