The engine to use for the TTS. The complete list of valid values for the engine attribute is shown below.
| Name | Value | Notes |
|---|---|---|
| FREECLIMB_STANDARD | freeclimb.standard | Represented in C# as 1 |
| FREECLIMB_NEURAL | freeclimb.neural | Represented in C# as 2 |
| ELEVEN_LABS | ElevenLabs | Represented in C# as 3 |