# Settings

In edit mode, you can change the following settings for your conversational-ai experience.

| Setting                     | Description                                                                                                                                                    |
| --------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Enable Microphone Input     | Enable or disable microphone input. Must be enabled for conversational experiences.                                                                            |
| Microphone Always Listening | Leave enabled for conversational experiences.                                                                                                                  |
| NLU Engine                  | Turns what you say in natural language into something a machine can understand. Authors can choose between Key Phrase (default) and \*\*GPT.                   |
| TTS Engine                  | Turns text into spoken words. Authors can choose between Google and \*\*ElevenLabs.                                                                            |
| Virtual Person Language     | The spoken language of all speaking entities. You can choose between English, Spanish, and \*Hindi.                                                            |
| Virtual Assistant Avatar    | A dropdown of virtual persons that have been added to the experience in the Scene Layout tab. Controls which VP should animate when using the AI Chat feature. |
| Virtual Assistant Voice     | A dropdown of voices. These options are the same as listed in [Natural Conversations](/ai/natural-conversations.md).                                           |

\*For Hindi, non-english text may not render correctly on the HyperSkill platform.

\*\*Only available for paying/select HyperSkill authors.

The **NLU Engine** option allows you to select between two options:

1. Key Phrase
   * Looks for and identifies important words in speech. The words/phrases must be an exact match. Great at detecting special keywords or phrases in speech.
2. GPT
   * High-accuracy technology capable of extrapolating from samples and understanding the flow and meaning of your words. The words/phrases do not need to be exact. This option is  available for paying users.

The **TTS Engine** option allows you to select between two options:

* Google
  * Generates text to speech using Google's Text-To-Speech technologies. Choose this option for quick and free speech.
* Eleven Labs
  * Generates high-quality speech using ElevenLab's proprietary Text-To-Speech technologies. Choose this option to generate high-quality voices. This option is available for paying users.


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