how can I include the BVCTelephony function to help with some of the background noise cancellation?

Thanks for reaching out, Arthur. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

Elaborate on what the RoomInputOptions object does?

The

RoomInputOptions

object in LiveKit is a handy configuration class that helps you decide how an agent handles input from participants in a room. It gives you detailed control over different parts of input processing, including: • Input Types Configuration: - Text Input: You can turn text input handling on or off. - Audio Input: Manage audio settings like noise cancellation, sample rate, and channel count. - Video Input: Let the agent receive video when you enable this. • Participant Management: Choose which types of participants (like agents or regular users) the agent should listen to for input. • Advanced Audio Options: Includes features like pre-connect audio handling with timeout settings and noise cancellation options such as BVC (Background Voice Cancellation) to boost audio quality. • Session Control: Decide if the session should close when a linked participant disconnects for certain reasons. Here’s a simple example to show you how it works:

from livekit.agents import RoomInputOptions
from livekit.plugins import noise_cancellation

# Example configuration
input_options = RoomInputOptions(
    noise_cancellation=noise_cancellation.BVC(),
    participant_kinds=[rtc.ParticipantKind.PARTICIPANT_KIND_AGENT],
    video_enabled=True
)

# Start agent session with the options
await session.start(
    agent=MyAgent(),
    room=ctx.room,
    room_input_options=input_options
)

This object is really helpful for tailoring how your app handles inputs and manages participant interactions in a LiveKit room. If you have any questions or want to explore more options, just let me know!

Also, how can I make my agent leave a voicemail if it detects the voicemail answering machine. I am currently following the way it is done in the docs, and it is not working

Hey there! If you want your agent to leave a voicemail when it spots an answering machine in LiveKit, here’s a simple way to do it: 1. Set Up Voicemail Detection and Handling: You can use the

detected_answering_machine

tool to leave a message and then hang up. Here’s an example:

@function_tool
async def detected_answering_machine(self):
    <http://logger.info|logger.info>(f"detected answering machine for {self.participant.identity}")
    await self.session.generate_reply(
        instructions="Leave a voicemail message letting the user know you'll call back later."
    )
    await asyncio.sleep(0.5)
    await self.hangup()

2. Keep an Eye on Silence: Monitoring silence can help spot voicemail systems. Check this out:

import asyncio
import time

SILENCE_THRESHOLD = 5  # seconds

async def monitor_interaction():
    while True:
        if time.time() - user_last_spoke_time > SILENCE_THRESHOLD:
            <http://logger.info|logger.info>("silent for too long! disconnecting")
            try:
                await ctx.room.disconnect()
            except Exception as e:
                logger.exception("Error while ending call")
        await asyncio.sleep(1)

3. Mix It Up for Better Accuracy: Combining silence monitoring with some LLM-based analysis can really boost detection. Here’s how:

async def monitor_interaction():
    while True:
        if time.time() - user_last_spoke_time > SILENCE_THRESHOLD:
            <http://logger.info|logger.info>("Attempting LLM-based voicemail detection")
            await ctx.session.generate_reply(
                instructions="Analyzing the call to detect voicemail..."
            )
            detection_result = await llm.detect_voicemail()
            if detection_result:
                await detected_answering_machine()
        await asyncio.sleep(1)

Just a heads up—make sure to tweak the silence threshold and test with different voicemail systems so it works smoothly. And hey, if you have any questions or want a hand with this, I’m here to help! Sources: Agent Testing & Evaluation | livekit/livekit_composite | DeepWiki | Agents telephony integration | LiveKit Docs | How to detect and handle silence during calls | agent.py | Speech & Audio Processing | livekit/livekit_composite | DeepWiki