dazzling-truck-32153
09/12/2025, 2:02 AMtall-airline-16756
09/12/2025, 2:02 AMtall-airline-16756
09/12/2025, 2:02 AMreturn self.verify_caller
in an async function to trigger the next function call. While this approach isn't a standard or documented method in Python or the LiveKit framework, don’t worry—there are recommended ways to guide the workflow smoothly in async functions by returning specific values:
• You can return another instance (like an Agent
) to hand off control to a new workflow.
• Alternatively, returning a tuple with a result message and the new instance allows you to provide some output before the handoff.
• Or, returning None
or a simple string lets you send output without triggering a handoff.
If you’re working within a particular framework or have more details about the verify_caller
function, please feel free to share! I’m here to help you navigate this and find the best solution.
Sources: Docs::Recipes | Workflows | LiveKit Docs | Workflows | LiveKit Docs | livekit-agents/livekit/agents/voice/agent.pydazzling-truck-32153
09/12/2025, 2:04 AMtall-airline-16756
09/12/2025, 2:05 AM@function_tool
decorated async function verify_caller
runs in sequence! You actually don’t need to call it manually because the LiveKit framework takes care of the execution order based on the Large Language Model (LLM)’s decisions. Let me walk you through it:
• Define the Tool: By decorating your function with @function_tool
and adding a clear docstring, you help the LLM understand exactly when to use it.
• LLM Decision-Making: The LLM smartly decides the order of function calls depending on the conversation and what the agent needs to do next.
• Automatic Execution: The framework makes sure each function runs one after the other — the next won’t start until the current one finishes.
So, for your verify_caller
function, it will be triggered whenever the LLM thinks it’s the right time. There’s no need to manually use return self.verify_caller
to force it. If anything’s still unclear or if you want to dive deeper, just let me know — I’m here to help!
Sources: Tool definition and use | LiveKit Docs | Tool definition and use | LiveKit Docs | tests/test_evals.py | realtime/openai-realtime-tools.pydazzling-truck-32153
09/12/2025, 2:08 AMtall-airline-16756
09/12/2025, 2:08 AMBackgroundAudioPlayer
to play built-in sounds like typing noises or some ambient music. Here’s a little example to get you started: background_audio = BackgroundAudioPlayer(
thinking_sound=[
AudioConfig(BuiltinAudioClip.KEYBOARD_TYPING, volume=0.8),
AudioConfig(BuiltinAudioClip.KEYBOARD_TYPING2, volume=0.7),
],
)
await background_audio.start(room=ctx.room, agent_session=session)
• Pre-recorded Audio: If you want to add a personal touch, you can play a custom audio file like some music or a sound effect: await play_wav_once("let_me_check_that.wav", ctx.room)
• Verbal Updates: Another great option is to have the agent give verbal feedback such as "Let me look that up..." right before starting the tool execution.
These little touches can really help keep users engaged during those longer processes. If you’d like, I’m here to help you set any of these up—just let me know!
Sources: External data and RAG | LiveKit Docs | delay-handling/README.mdoc | Web and mobile frontends | LiveKit Docsdazzling-truck-32153
09/12/2025, 2:12 AMtall-airline-16756
09/12/2025, 2:12 AMWavPlayer
utility. Here’s a simple way to do it:
from agent_extensions.utils import WavPlayer
import asyncio
# Initialize the player
wav_player = WavPlayer()
async def my_async_function(ctx):
# Play a WAV file and wait for it to finish
await wav_player.play_once("path/to/audio.wav", ctx.room, volume=0.3)
# This part runs only after the audio finishes playing
print("Audio playback finished, continuing with next steps...")
# ... rest of your logic
Here are some helpful features to keep in mind:
• Audio Track Management: The WavPlayer
takes care of setting up and publishing the audio track to the room, so you don’t have to worry about it.
• Volume Control: You can easily adjust the playback volume with the volume
parameter to suit your needs.
• Error Handling: It makes sure to clean up resources if anything goes wrong during playback.
• Reusability: The player caches audio files, which means faster playback when you use the same file multiple times.
This approach helps your WAV file play smoothly, and your function will continue only after the audio finishes. If you have any questions or want me to walk you through it further, just let me know—I’m here to help!
Sources: delay-handling/README.mdocdazzling-truck-32153
09/12/2025, 2:13 AMtall-airline-16756
09/12/2025, 2:14 AMprint()
statements, but it’s important to understand that these aren’t instructions for the LLM itself. Instead, print()
is primarily used for logging or debugging while the backend logic runs. Here’s a simple example to illustrate:
@function_tool
async def print_to_console(self, context: RunContext):
print("Console Print Success!") # Outputs to the agent's runtime console
return "I’ve printed to the console."
Here are some key points to keep in mind:
• Execution Context: The print()
statement sends output to the console or log stream, which is really helpful for debugging and monitoring.
• LLM Behavior: The LLM doesn’t interpret print()
as a direct instruction; it just triggers the function tool where the print happens behind the scenes.
• Feedback to Users: If you want to give feedback to the user, it’s best to include a return value in the function that the agent can then vocalize or display.
Also, for more structured logging in a production environment, you might want to explore Python’s logging
module instead of relying on raw print()
statements. If you have any questions or want me to walk you through this further, just let me know—I’m here to help!
Sources: tool_calling/update_tools.pydazzling-truck-32153
09/12/2025, 4:36 AMtall-airline-16756
09/12/2025, 4:37 AMdazzling-truck-32153
09/12/2025, 4:39 AMtall-airline-16756
09/12/2025, 4:39 AMdazzling-truck-32153
09/12/2025, 4:39 AMtall-airline-16756
09/12/2025, 4:39 AM