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feat(google): support Gemini TTS style profile

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Peter Steinberger
2026-04-25 06:11:15 +01:00
parent 3f63ba8fd8
commit 8acc92c881
5 changed files with 88 additions and 4 deletions
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12
docs/providers/google.md
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@@ -267,6 +267,7 @@ To use Google as the default TTS provider:
google: {
model: "gemini-3.1-flash-tts-preview",
voiceName: "Kore",
audioProfile: "Speak professionally with a calm tone.",
},
},
},
@@ -274,9 +275,14 @@ To use Google as the default TTS provider:
}
```
Gemini API TTS accepts expressive square-bracket audio tags in the text, such as
`[whispers]` or `[laughs]`. To keep tags out of the visible chat reply while
sending them to TTS, put them inside a `[[tts:text]]...[[/tts:text]]` block:
Gemini API TTS uses natural-language prompting for style control. Set
`audioProfile` to prepend a reusable style prompt before the spoken text. Set
`speakerName` when your prompt text refers to a named speaker.
Gemini API TTS also accepts expressive square-bracket audio tags in the text,
such as `[whispers]` or `[laughs]`. To keep tags out of the visible chat reply
while sending them to TTS, put them inside a `[[tts:text]]...[[/tts:text]]`
block:
```text
Here is the clean reply text.

2
docs/tools/tts.md
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@@ -379,6 +379,8 @@ Then run:
- `providers.minimax.pitch`: integer pitch shift `-12..12` (default 0). Fractional values are truncated before calling MiniMax T2A because the API rejects non-integer pitch values.
- `providers.google.model`: Gemini TTS model (default `gemini-3.1-flash-tts-preview`).
- `providers.google.voiceName`: Gemini prebuilt voice name (default `Kore`; `voice` is also accepted).
- `providers.google.audioProfile`: natural-language style prompt prepended before the spoken text.
- `providers.google.speakerName`: optional speaker label prepended before the spoken text when your TTS prompt uses a named speaker.
- `providers.google.baseUrl`: override the Gemini API base URL. Only `https://generativelanguage.googleapis.com` is accepted.
- If `messages.tts.providers.google.apiKey` is omitted, TTS can reuse `models.providers.google.apiKey` before env fallback.
- `providers.gradium.baseUrl`: override Gradium API base URL (default `https://api.gradium.ai`).