Remove non-working Daily/WebRTC example
The Daily transport example had authentication issues. Keeping the local audio example (07zb-interruptible-camb-local.py) which works.
This commit is contained in:
Neil Ruaro
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#
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# Copyright (c) 2024–2025, Daily
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#
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# SPDX-License-Identifier: BSD 2-Clause License
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#
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"""Camb.ai MARS-8 TTS example with interruption handling.
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This example demonstrates:
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- Basic TTS synthesis with Camb.ai MARS-8
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- Voice selection
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- Speed control
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- Handling interruptions
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Requirements:
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- CAMB_API_KEY environment variable
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- OPENAI_API_KEY environment variable (for LLM)
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- DEEPGRAM_API_KEY environment variable (for STT)
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Usage:
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export CAMB_API_KEY=your_camb_api_key
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export OPENAI_API_KEY=your_openai_api_key
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export DEEPGRAM_API_KEY=your_deepgram_api_key
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python 07za-interruptible-camb.py --transport daily
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For more information:
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- Camb.ai API docs: https://camb.mintlify.app/
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- Pipecat docs: https://docs.pipecat.ai/
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"""
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import os
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import aiohttp
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from dotenv import load_dotenv
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from loguru import logger
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from pipecat.audio.vad.silero import SileroVADAnalyzer
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from pipecat.audio.vad.vad_analyzer import VADParams
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from pipecat.frames.frames import LLMRunFrame
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from pipecat.pipeline.pipeline import Pipeline
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from pipecat.pipeline.runner import PipelineRunner
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from pipecat.pipeline.task import PipelineParams, PipelineTask
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from pipecat.processors.aggregators.llm_context import LLMContext
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from pipecat.processors.aggregators.llm_response_universal import (
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LLMContextAggregatorPair,
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)
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from pipecat.runner.types import RunnerArguments
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from pipecat.runner.utils import create_transport
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from pipecat.services.camb.tts import CambTTSService
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from pipecat.services.deepgram.stt import DeepgramSTTService
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from pipecat.services.openai.llm import OpenAILLMService
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from pipecat.transports.base_transport import BaseTransport, TransportParams
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from pipecat.transports.daily.transport import DailyParams
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from pipecat.transports.websocket.fastapi import FastAPIWebsocketParams
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load_dotenv(override=True)
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# Transport configuration for different platforms
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transport_params = {
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"daily": lambda: DailyParams(
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audio_in_enabled=True,
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audio_out_enabled=True,
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vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
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),
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"twilio": lambda: FastAPIWebsocketParams(
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audio_in_enabled=True,
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audio_out_enabled=True,
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vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
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),
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"webrtc": lambda: TransportParams(
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audio_in_enabled=True,
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audio_out_enabled=True,
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vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
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),
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}
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async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
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"""Run the bot with Camb.ai TTS.
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Args:
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transport: The transport to use for audio I/O.
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runner_args: Runner arguments from the CLI.
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"""
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logger.info("Starting Camb.ai TTS bot")
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# Create an HTTP session for the TTS service
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async with aiohttp.ClientSession() as session:
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# Initialize Deepgram STT for speech recognition
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stt = DeepgramSTTService(api_key=os.getenv("DEEPGRAM_API_KEY"))
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# Initialize Camb.ai TTS with MARS-8-flash model (fastest)
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tts = CambTTSService(
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api_key=os.getenv("CAMB_API_KEY"),
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aiohttp_session=session,
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voice_id=2681, # Attic voice (default)
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model="mars-8-flash", # Fast inference model
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params=CambTTSService.InputParams(
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speed=1.0, # Normal speed (0.5-2.0 range)
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),
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)
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# Initialize OpenAI LLM
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llm = OpenAILLMService(api_key=os.getenv("OPENAI_API_KEY"))
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# System prompt for the assistant
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messages = [
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{
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"role": "system",
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"content": """You are a helpful voice assistant powered by Camb.ai's MARS-8
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text-to-speech technology. Your goal is to have natural conversations and demonstrate
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high-quality speech synthesis. Keep your responses concise and conversational since
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they will be spoken aloud. Avoid special characters, emojis, or bullet points that
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can't easily be spoken.""",
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},
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]
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# Set up context management
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context = LLMContext(messages)
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context_aggregator = LLMContextAggregatorPair(context)
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# Build the pipeline
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pipeline = Pipeline(
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[
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transport.input(), # Transport user input
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stt, # Speech-to-text
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context_aggregator.user(), # User context aggregation
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llm, # Language model
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tts, # Camb.ai TTS
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transport.output(), # Transport bot output
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context_aggregator.assistant(), # Assistant context aggregation
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]
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)
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# Create the pipeline task
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task = PipelineTask(
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pipeline,
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params=PipelineParams(
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enable_metrics=True,
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enable_usage_metrics=True,
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),
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idle_timeout_secs=runner_args.pipeline_idle_timeout_secs,
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)
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@transport.event_handler("on_client_connected")
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async def on_client_connected(transport, client):
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logger.info("Client connected")
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# Start the conversation with a greeting
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messages.append(
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{
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"role": "system",
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"content": "Please introduce yourself briefly and ask how you can help.",
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}
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)
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await task.queue_frames([LLMRunFrame()])
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@transport.event_handler("on_client_disconnected")
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async def on_client_disconnected(transport, client):
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logger.info("Client disconnected")
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await task.cancel()
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# Run the pipeline
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runner = PipelineRunner(handle_sigint=runner_args.handle_sigint)
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await runner.run(task)
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async def bot(runner_args: RunnerArguments):
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"""Main bot entry point compatible with Pipecat Cloud.
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Args:
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runner_args: Arguments passed from the runner.
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"""
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transport = await create_transport(runner_args, transport_params)
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await run_bot(transport, runner_args)
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async def list_available_voices():
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"""Helper function to list available Camb.ai voices.
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Run this to see what voices are available for your API key.
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"""
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async with aiohttp.ClientSession() as session:
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voices = await CambTTSService.list_voices(
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api_key=os.getenv("CAMB_API_KEY"),
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aiohttp_session=session,
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)
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print("\nAvailable Camb.ai voices:")
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print("-" * 50)
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for voice in voices:
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print(f" ID: {voice['id']}, Name: {voice['name']}, Gender: {voice['gender']}")
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print("-" * 50)
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print(f"Total: {len(voices)} voices\n")
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if __name__ == "__main__":
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import sys
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# If --list-voices flag is passed, list voices and exit
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if "--list-voices" in sys.argv:
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import asyncio
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asyncio.run(list_available_voices())
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else:
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from pipecat.runner.run import main
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main()
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