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Solve this error: 5-07-24 13:15:10,199 - WARNING ...
# ask-ai
b
Solve this error: 2025-07-24 131510,199 - WARNING livekit.agents - failed to synthesize speech, retrying in 0.1s Traceback (most recent call last): File "/home/hdfc/Desktop/fatima/cc/cc-resume-based/venv/lib/python3.11/site-packages/livekit/plugins/google/tts.py", line 208, in _run emitter = tts.SynthesizedAudioEmitter( ^^^^^^^^^^^^^^^^^^^^^^^^^^^ AttributeError: module 'livekit.agents.tts' has no attribute 'SynthesizedAudioEmitter' The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/home/hdfc/Desktop/fatima/cc/cc-resume-based/venv/lib/python3.11/site-packages/livekit/agents/tts/tts.py", line 197, in _main_task return await self._run() ^^^^^^^^^^^^^^^^^ File "/home/hdfc/Desktop/fatima/cc/cc-resume-based/venv/lib/python3.11/site-packages/livekit/plugins/google/tts.py", line 228, in _run raise APIConnectionError() from e livekit.agents._exceptions.APIConnectionError: Connection error. {"tts": "livekit.plugins.google.tts.TTS", "attempt": 1, "streamed": false, "pid": 15438, "job_id": "AJ_3zg4JdJfpbfj"} 2025-07-24 131510,406 - ERROR asyncio - Future exception was never retrieved future: <Future finished exception=InvalidDataError(1094995529, 'Invalid data found when processing input', '<none>')> Traceback (most recent call last): File "/usr/lib/python3.11/concurrent/futures/thread.py", line 58, in run result = self.fn(*self.args, **self.kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/hdfc/Desktop/fatima/cc/cc-resume-based/venv/lib/python3.11/site-packages/livekit/agents/utils/codecs/decoder.py", line 132, in _decode_loop container = av.open(self._input_buf) ^^^^^^^^^^^^^^^^^^^^^^^^ File "av/container/core.pyx", line 369, in av.container.core.open File "av/container/core.pyx", line 236, in av.container.core.Container.cinit File "av/container/core.pyx", line 256, in av.container.core.Container.err_check File "av/error.pyx", line 428, in av.error.err_check av.error.InvalidDataError: [Errno 1094995529] Invalid data found when processing input: '<none>'
t
Thanks for reaching out, Fatima. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.
The error occurs because the 
SynthesizedAudioEmitter
class does not exist in the LiveKit Agents TTS module. Instead, you should use the 
SynthesizedAudio
class for working with synthesized audio data. Here’s how you can resolve the issue: 1. Replace any imports of 
SynthesizedAudioEmitter
with `SynthesizedAudio`:
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# ❌ Incorrect - this class doesn’t exist
from livekit.agents.tts import SynthesizedAudioEmitter

# ✅ Correct
from livekit.agents.tts import SynthesizedAudio
1. If you need to emit or handle audio data internally, the 
AudioEmitter
class is available, but it is typically used internally by the TTS implementations rather than in user code. 2. For example usage, here’s how you can work with TTS and synthesized audio:
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from livekit import agents, rtc
from livekit.agents.tts import SynthesizedAudio
from livekit.plugins import elevenlabs
from typing import AsyncIterable

tts = elevenlabs.TTS(model_id="eleven_turbo_v2")
tts_stream = tts.stream()

async def send_audio(audio_stream: AsyncIterable[SynthesizedAudio]):
    async for a in audio_stream:
        await audio_source.capture_frame(a.frame)
This should resolve the 
AttributeError
and allow your TTS functionality to work as expected. Sources: livekit-plugins/livekit-plugins-aws/livekit/plugins/aws/__init__.py | Working with plugins | LiveKit Docs
b
I want google tts implementaion library versions are: livekit==0.19.1 livekit-agents==0.12.16 livekit-api==0.8.1 livekit-plugins-deepgram==0.6.17 livekit-plugins-google==0.11.3 livekit-plugins-openai==0.10.14 livekit-plugins-silero==0.7.4 livekit-plugins-turn-detector==0.4.0 livekit-protocol==0.8.0
t
To implement Google TTS using the 
livekit-plugins-google
version 0.11.3, I've got you covered with a friendly walkthrough! 😊 1. Install the Plugin: Let's get started by installing the plugin with this super simple command:
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bash pip install "livekit-agents[google]~=1.0"
2. Authentication: Setting up your Google Cloud credentials is a breeze! You've got three easy options: - Pop the credentials into a 
credentials_info
dictionary. - Use a 
credentials_file
JSON file and set the 
GOOGLE_APPLICATION_CREDENTIALS
environment variable. - Go with Application Default Credentials if that's easier for you. 3. Basic Implementation: Here's a friendly example of creating and using a Google TTS instance that'll make your code sing:
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python from livekit.plugins import google # Create TTS instance tts = google.TTS( language="en-US", gender="female", voice_name="en-US-Standard-H", sample_rate=24000, credentials_file="path/to/credentials.json" # or use credentials_info ) # Use in an AgentSession from livekit.agents import AgentSession session = AgentSession( tts=google.TTS( gender="female", voice_name="en-US-Standard-H", ), # ... llm, stt, etc. )
4. Key Parameters: Think of these as your TTS voice's personal settings - super customizable! - `language`: Language code (default: "en-US"). - `gender`: Voice gender - "male", "female", or "neutral" (default: "neutral"). - `voice_name`: Specific voice name (default: "en-US-Chirp3-HD-Charon"). - `sample_rate`: Audio sample rate in Hz (default: 24000). - `pitch`: Speaking pitch from -20.0 to 20.0 semitones (default: 0). - `speaking_rate`: Speed of speech (default: 1.0). - `volume_gain_db`: Volume gain in decibels (default: 0.0). - `use_streaming`: Whether to use streaming synthesis (default: True). - `enable_ssml`: Whether to enable SSML support (default: False). 5. Text Synthesis: Turning text into speech is as easy as pie:
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python # Synthesize text chunked_stream = tts.synthesize("Hello, this is a test message.") # Or use streaming stream = tts.stream() # Push text to stream as needed
6. SSML Support: Want to get fancy with speech customization? SSML's got your back:
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python tts = google.TTS( enable_ssml=True, use_streaming=False # Required when using SSML )
7. Dynamic Options Update: Feel like changing things up? No problem! Update your TTS options on the fly:
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python tts.update_options( language="es-ES", gender="male", voice_name="es-ES-Standard-A", speaking_rate=0.8, volume_gain_db=2.0 )
And there you have it! A complete Google TTS integration with LiveKit Agents that's flexible, powerful, and honestly, pretty fun to use. Happy coding! 🚀🎙️ Sources: Google Cloud TTS integration guide | LiveKit Docs | livekit-plugins/livekit-plugins-spitch/livekit/plugins/spitch/tts.py
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