TTS only node?

[martinjo]

I have flow steps where the spoken text must be exactly what I specify—no creative liberties. Is there a way in pipecat-flows to send a fixed string directly to the TTS provider without any LLM involvement?

Goal
Trigger TTS with a predefined string and have that exact text synthesized.

Why
Certain parts of the experience (e.g., medical/compliance disclaimers and confirmations) must be deterministic. As soon as an LLM is in the loop, there’s uncertainty about what will be said.

Questions
Is there an existing node/operator/pattern to do a literal “say” that bypasses the LLM entirely?
Can I wire a static text source directly into TTS in the current API?
If this exists, could you point me to an example?

I have tried creating a node that uses pre_actions, but the LLM is still invoked.

def create_message_only_node(node_name: str, message: str, end_conversation: bool = True) -> NodeConfig:
pre_actions = [
{
"type": "tts_say",
"text": message,
}
]

if end_conversation:
    pre_actions.append({
        "type": "end_conversation"
    })

return NodeConfig(
    name=node_name,
    role_messages=[],  # Empty role messages to clear context
    task_messages=[],  # Empty task messages so LLM has nothing to respond to
    pre_actions=pre_actions,
    functions=[],  # No functions to call
    respond_immediately=False,
)

[narsimhaReddyJuspay]

hey did u make any progress on this ?

[nicoledevriestopicus]

also curious if you have made any progress on this