# Combine Audio

> Join audio clips end to end into one file, in the order you choose, and trim each clip first. For narration, podcasts and dialogue made in several parts.

Source: https://nodaro.ai/docs/nodes/audio/combine-audio

The **Combine Audio** node joins audio clips end to end into one file. Each connected clip becomes a segment, the segments play in the order you set, and you can trim each one before it is joined. To play clips at the same time instead, use [Mix Audio](https://nodaro.ai/docs/nodes/audio/mix-audio).

- Found in: Audio › Edit Audio
- Output: audio
- API type: `combine-audio`

## When to use it
- Join the voiceover lines of several scenes into one narration track.
- Put an intro, a main part and an outro one after another.
- Join the parts of a long conversation made in several [Text to Dialogue](https://nodaro.ai/docs/nodes/audio/text-to-dialogue) nodes.

## Quick start
### Add the node

Press Tab on the canvas and choose **Audio › Edit Audio › Combine Audio**.

### Connect the clips

Wire each audio node into the **Audio** input. Each connection becomes a segment, and a new connection is added at the end.

### Set the order and the trims

Open the settings panel. Drag the segments into order; they play from top to bottom. To trim a segment, set its **Start (s)** and **End (s)**.

### Run it

Click **Run** on the node. The joined audio appears on the node with a player.

Workflow: Three voiceover lines are joined into one narration track and merged onto a video.

- Text to Speech → Combine Audio (audio)
- Text to Speech → Combine Audio (audio)
- Text to Speech → Combine Audio (audio)
- Combine Audio → Merge Video & Audio (audio)

## Input and output
| Input | Accepts | What it does |
| --- | --- | --- |
| **Audio** | One or more audio nodes | The clips to join. Each connection becomes one segment. |

The output, **Audio**, is one file with every segment in order.

## Settings
| Setting | What it does |
| --- | --- |
| Segment order | The connected clips, from top to bottom. Drag a segment to move it. |
| **Start (s)** | Where a segment starts, in seconds. Optional, per segment. |
| **End (s)** | Where a segment ends, in seconds. Optional, per segment. |

## Combine or mix

| | Combine Audio | [Mix Audio](https://nodaro.ai/docs/nodes/audio/mix-audio) |
| --- | --- | --- |
| **How clips play** | One after another | At the same time, layered |
| **Per-clip control** | Start and end trim | Volume from 0 to 200% |
| **Typical use** | Narration in parts, intro and outro | Voiceover over music, effects over ambience |

## From the API
`POST /v1/combine-audio` takes `segments`, a list of objects with a `url` and an optional `startTime` and `endTime`. See [Voice and media](https://nodaro.ai/docs/developers/api/voice-and-media).

## Frequently asked questions

### What is the difference between Combine Audio and Mix Audio?

Combine Audio plays the clips one after another in a single file. Mix Audio plays them at the same time, layered on top of each other, with a volume for each track.

### How do I change the order of the clips?

Drag the segments in the settings panel. They play from top to bottom. A new connection is added at the end of the list.

### Can I trim each clip before it is joined?

Yes. Each segment has its own Start (s) and End (s) fields. Leave them empty to use the whole clip.