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feat: add voice cloning and speaking rate to GoogleTTSService

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This commit is contained in:
Manish Kumar
2025-08-30 22:59:10 +05:30
parent c1b8d2acab
commit 2ee481d541
1 changed files with 17 additions and 3 deletions
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20
src/pipecat/services/google/tts.py
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@@ -500,9 +500,11 @@ class GoogleTTSService(TTSService):
Parameters:
language: Language for synthesis. Defaults to English.
speaking_rate: The speaking rate, in the range [0.25, 4.0].
"""
language: Optional[Language] = Language.EN
speaking_rate: Optional[float] = None
def __init__(
self,
@@ -510,6 +512,7 @@ class GoogleTTSService(TTSService):
credentials: Optional[str] = None,
credentials_path: Optional[str] = None,
voice_id: str = "en-US-Chirp3-HD-Charon",
voice_cloning_key: Optional[str] = None,
sample_rate: Optional[int] = None,
params: InputParams = InputParams(),
**kwargs,
@@ -532,8 +535,10 @@ class GoogleTTSService(TTSService):
"language": self.language_to_service_language(params.language)
if params.language
else "en-US",
"speaking_rate": params.speaking_rate,
}
self.set_voice(voice_id)
self._voice_cloning_key = voice_cloning_key
self._client: texttospeech_v1.TextToSpeechAsyncClient = self._create_client(
credentials, credentials_path
)
@@ -600,15 +605,24 @@ class GoogleTTSService(TTSService):
try:
await self.start_ttfb_metrics()
voice = texttospeech_v1.VoiceSelectionParams(
language_code=self._settings["language"], name=self._voice_id
)
if self._voice_cloning_key:
voice_clone_params = texttospeech_v1.VoiceCloneParams(
voice_cloning_key=self._voice_cloning_key
)
voice = texttospeech_v1.VoiceSelectionParams(
language_code=self._settings["language"], voice_clone=voice_clone_params
)
else:
voice = texttospeech_v1.VoiceSelectionParams(
language_code=self._settings["language"], name=self._voice_id
)
streaming_config = texttospeech_v1.StreamingSynthesizeConfig(
voice=voice,
streaming_audio_config=texttospeech_v1.StreamingAudioConfig(
audio_encoding=texttospeech_v1.AudioEncoding.PCM,
sample_rate_hertz=self.sample_rate,
speaking_rate=self._settings["speaking_rate"],
),
)
config_request = texttospeech_v1.StreamingSynthesizeRequest(