Kokoro-FastAPI/examples/openai_streaming_audio.py

#!/usr/bin/env rye run python

import time
from pathlib import Path

from openai import OpenAI

# gets OPENAI_API_KEY from your environment variables
openai = OpenAI(base_url="http://localhost:8880/v1", api_key="not-needed-for-local")

speech_file_path = Path(__file__).parent / "speech.mp3"


def main() -> None:
    stream_to_speakers()

    # Create text-to-speech audio file
    with openai.audio.speech.with_streaming_response.create(
        model="kokoro",
        voice="af",
        input="the quick brown fox jumped over the lazy dogs",
    ) as response:
        response.stream_to_file(speech_file_path)



def stream_to_speakers() -> None:
    import pyaudio

    player_stream = pyaudio.PyAudio().open(format=pyaudio.paInt16, channels=1, rate=24000, output=True)

    start_time = time.time()

    with openai.audio.speech.with_streaming_response.create(
        model="kokoro",
        voice="af",
        response_format="pcm",  # similar to WAV, but without a header chunk at the start.
        input="""I see skies of blue and clouds of white
                The bright blessed days, the dark sacred nights
                And I think to myself
                What a wonderful world""",
    ) as response:
        print(f"Time to first byte: {int((time.time() - start_time) * 1000)}ms")
        for chunk in response.iter_bytes(chunk_size=1024):
            player_stream.write(chunk)

    print(f"Done in {int((time.time() - start_time) * 1000)}ms.")


if __name__ == "__main__":
    main()