Add support to realtime API for setting "speed" of the models responses (openai#1309)

Author: sect2k

src/agents/realtime/config.py

@@ -94,6 +94,9 @@ class RealtimeSessionModelSettings(TypedDict):
  voice: NotRequired[str]
  """The voice to use for audio output."""
 
+ speed: NotRequired[float]
+ """The speed of the model's responses."""
+
  input_audio_format: NotRequired[RealtimeAudioFormat]
  """The format for input audio streams."""
 

src/agents/realtime/openai_realtime.py

@@ -569,6 +569,7 @@ def _get_session_config(
  or DEFAULT_MODEL_SETTINGS.get("model_name")
  ),
  voice=model_settings.get("voice", DEFAULT_MODEL_SETTINGS.get("voice")),
+ speed=model_settings.get("speed", None),
  modalities=model_settings.get("modalities", DEFAULT_MODEL_SETTINGS.get("modalities")),
  input_audio_format=model_settings.get(
  "input_audio_format",