# Auto

| Message           | Description                                                  | Arguments |
| ----------------- | ------------------------------------------------------------ | --------- |
| `/mixeffect/auto` | Performs an Auto transition on the selected Mix Effects Bus. | Integer   |

| Argument | Type    | Description                                          |
| -------- | ------- | ---------------------------------------------------- |
| M/E      | Integer | One-based index of the Mix Effect Bus. Default is 1. |

> **NOTE**: This command is different from the SuperSource Auto command in that it always performs an Auto transition between the Preview and Program source, whereas the SuperSource Auto command performs as Auto transition between Program and SuperSource.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.mixeffect.app/automate/osc/messages/mix-effects-bus/auto.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.