rapid-painting-51133
04/06/2026, 10:34 PMtall-airline-16756
04/06/2026, 10:34 PMtall-airline-16756
04/06/2026, 10:35 PMsession.generate_reply() from inside a tool/agent to speak short status messages (e.g., “Let me check that for you”) while the LLM work runs.
• For minimal latency, pre-synthesize and cache common TTS phrases and play those immediately.
• Start the verbal update without awaiting it, run the LLM call concurrently, then cancel/interrupt the hold message if the LLM finishes quickly:
a. Start hold speech (or `say()`/`generate_reply()` returning a handle).
b. Call the LLM (await).
c. If the hold speech is still playing, interrupt/cancel it.
• If you need the speech to be uninterruptible (for critical write operations), call context.disallow_interruptions() at the start of the tool.
If you want, tell me which environment/language you’re using (Python/JS, agent framework, or pipeline) and I’ll provide a short code snippet matching your setup.
Sources: External data and RAG | LiveKit Documentation | Audio customization | LiveKit Documentation | Agent speech and audio | LiveKit Documentation, with interactive elementsrapid-painting-51133
04/06/2026, 10:39 PMtall-airline-16756
04/06/2026, 10:40 PM# Example uses an async agent/tool context similar to LiveKit-style APIs:
# - context.session.say(...) returns a handle object with .done() and .interrupt()
# - context.session.generate_reply(...) can also be used for natural replies
# - call_llm() represents your long-running LLM call
import asyncio
async def call_llm():
# simulate long-running LLM call
await asyncio.sleep(3)
return "LLM result"
async def run_with_verbal_status(context):
# Optionally use cached TTS audio for instant playback:
# cached_audio = get_cached_audio("Let me check that for you")
# hold_handle = context.session.say("Let me check that for you.", audio=cached_audio)
# Start a spoken hold message without awaiting it
hold_handle = context.session.say("One moment while I check that for you.")
# Run the LLM call concurrently
llm_task = asyncio.create_task(call_llm())
# Option A: Wait for the LLM result and stop hold early if still playing
result = await llm_task
if not hold_handle.done():
hold_handle.interrupt() # stop the hold message immediately
# Option B: If you want to allow user speech to interrupt automatically, do nothing special.
# Send final spoken reply (or use session.generate_reply for a reply from the agent)
await context.session.generate_reply(instructions=f"Here is the result: {result}")
return result
Notes:
• Pre-synthesizing/caching common phrases reduces TTS latency.
• If you must prevent interruption during the tool, call context.disallow_interruptions() at the start.
• Use generate_reply() when you want the agent to produce a natural spoken reply after the LLM completes.
If you’d like, I can adapt this to your exact agent framework or show a version using generate_reply() for the hold message or cached audio usage. Which do you prefer?
, with interactive elements