[Conversational AI] Chat-Only setup still needs AudioInterface defined for Conversation class

[varun-d]

Description

Steps to reproduce

Following the documentation for Chat Mode, for chat-mode.

As per documentation, we use:

# ... imports
client = ElevenLabs(api_key=API_KEY)
config = ConversationInitiationData(
    conversation_config_override={"conversation": {"text_only": True}},
)

# setup conversation module
conversation = Conversation(
    elevenlabs,
    agent_id,
    requires_auth=bool(api_key),
    config=config, # and so on...

Expected Behavior

Be able to run chat-mode mode with the conversation instance.

Actual Behavior

1. Error on Conversation class -> missing audio_interface param.
2. I check the SDK, it is NOT set as optional.

#In file /elevenlabs/conversational_ai/conversation.py line:465
class Conversation(BaseConversation):
    audio_interface: AudioInterface # NOT OPTIONAL!
    callback_agent_response: Optional[Callable[[str], None]]
    callback_agent_response_correction: Optional[Callable[[str, str], None]]
    callback_user_transcript: Optional[Callable[[str], None]]

Quick Temporary Fix
Create a dummy audio_interface or a mock audio interface as per SDK tests:

from elevenlabs.conversational_ai.default_audio_interface import DefaultAudioInterface

class DummyAudioInterface(DefaultAudioInterface):
    pass

With a dummy audio interface, chat-mode override works fine.

Code example

No response

Additional context

No response