Plays the pre-generated chapter audio for the chosen voice
Voice Settings
Each parameter shows ElevenLabs' documented default, this service's configured
value (its env override, if any — otherwise the same as the default), and this
voice's own saved value (if any). The effective value when nothing below is
checked is whichever of those is most specific: the voice's own value, else the
service's, else ElevenLabs' default. Check Custom to send a one-off value for
this generation only instead — unchecked parameters are left out of the request
entirely, not sent as the value shown here.