# Generate speech · Gemini - Workflow node | Docs - nodulz

Source: https://nodulz.com/docs/nodes/generate_speech_google

Language: en

Generate speech or a dialogue between two speakers.

## Usage and specifics

Supply the required audio input or text and provider credential. Text and audio outputs depend on the operation; preserve MIME types when mapping. Demucs runs locally and needs installed dependencies; remote models depend on account access.

Technical type : `generate_speech_google`. Runtime : `nodulz`.

## Credentials and prerequisites

- [Create and configure the credential : gemini](/docs/credentials/gemini)

Create credentials in your nodulz instance’s Credentials area, then select them on the node. Availability depends on ownership and sharing. See the [credentials guide](/docs/credentials) for access and rotation.

## Parameters

Names below are technical keys. Defaults are not a ready-to-run configuration: complete fields required by your operation. Paths containing [] describe list items; some fields depend on the selected mode.

| Parameter | Type | Default | Values / limits |
| --- | --- | --- | --- |
| `credentialId` | `string` | `""` | - |
| `timeoutSeconds` | `number` | `120` | -; ≥ 1, ≤ 3600 |
| `text` | `string` | `""` | - |
| `instructions` | `string` | `""` | - |
| `model` | `string` | `"gemini-3.8-flash-tts"` | -; min 1, max 128 |
| `voice` | `string` | `"Kore"` | -; min 1 |
| `speakers` | `array` | `[]` | -; max 2 |
| `speakers[].name` | `string` | - | -; min 1, max 100 |
| `speakers[].voice` | `string` | - | -; min 1, max 100 |

## Configuration help

| Setting | Purpose and guidance |
| --- | --- |
| `credentialId`<br>AI credential | {provider} API credential accessible to the workflow owner. The provider bills API requests. |
| `speakers`<br>Two-speaker dialogue | Configure two distinct speaker names and voices. Identify speakers in the text, for example Joe: Hello. Jane: Hi. |
| `timeoutSeconds`<br>Timeout (seconds) | Maximum AI request time, within the overall workflow timeout. |

## Initial configuration

Initial catalog configuration example, to adapt before running. Keep secrets in credentials.

```json
{
  "credentialId": "",
  "timeoutSeconds": 120,
  "text": "",
  "instructions": "",
  "model": "gemini-3.8-flash-tts",
  "voice": "Kore",
  "speakers": []
}
```

## Verification

Test with representative data. Check node output in the inspector and logs, then use editor mapping for downstream fields. A trigger test with a simulated payload does not validate external service delivery.

See also : [Expressions and data](/docs/expressions), [Executions](/docs/executions), [Node catalog](/docs/nodes).

## Explore further

- [Features - nodulz](https://nodulz.com/product/overview)
- [Node catalog - nodulz](https://nodulz.com/product/catalog)
- [MCP server - nodulz](https://nodulz.com/product/mcp)
- [Pricing - nodulz](https://nodulz.com/pricing)
- [Use cases and workflow automation - nodulz](https://nodulz.com/use-cases)
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- [Documentation - nodulz](https://nodulz.com/docs)