OpenAITTSService (openai/tts.py)

Async OpenAI TTS service that streams PCM audio from text, supporting multiple voices and metrics.

# Source: https://github.com/cmwaseemyousef/ai-cold-calling-bot | License: BSD-2-Clause | Copyright 2024–2025, Daily
# Provided via justclaw.it.com; keep this notice with the code.
#
# Copyright (c) 2024–2025, Daily
#
# SPDX-License-Identifier: BSD 2-Clause License
#

"""OpenAI text-to-speech service implementation.

This module provides integration with OpenAI's text-to-speech API for
generating high-quality synthetic speech from text input.
"""

from typing import AsyncGenerator, Dict, Literal, Optional

from loguru import logger
from openai import AsyncOpenAI, BadRequestError

from pipecat.frames.frames import (
    ErrorFrame,
    Frame,
    StartFrame,
    TTSAudioRawFrame,
    TTSStartedFrame,
    TTSStoppedFrame,
)
from pipecat.services.tts_service import TTSService
from pipecat.uti

... (truncated -- full source via MCP)