Delay (in seconds) between forwarding the first audio frame and the AudioOutput
reporting playback started. Near-zero for the default room output (self-reported
when the frame is pushed to the track, so it doesn't account for network delivery
to the client); meaningful when a remote avatar worker is in the chain and reports
playback via the lk.playback_started RPC.
Delay (in seconds) between forwarding the first audio frame and the
AudioOutputreporting playback started. Near-zero for the default room output (self-reported when the frame is pushed to the track, so it doesn't account for network delivery to the client); meaningful when a remote avatar worker is in the chain and reports playback via thelk.playback_startedRPC.Assistant
ChatMessageonly.