OptionalaudioStream conversation audio to local speakers during the run (PRD §4.7).
OptionaldefaultDefault in-message audio format (defaults to DEFAULT_AUDIO_FORMAT).
OptionalincludeOptionalincludeOptionalincludeOptionalsttCustom provider instance, or a descriptor to resolve via the router.
OptionalttsTTS provider + voice routing for the user simulator.
Per-run voice config that rides on
ScenarioConfig.voice.sttaccepts either a concrete STTProvider instance (BYO) or an SttConfig descriptor (resolved through the provider router). When unset, the resolver constructs the default OpenAI provider per-run.