---
title: How to add music to a video
description: Add a soundtrack that plays under your whole video, choose where it starts, its volume and how it fades out.
canonical: https://postnitro.ai/docs/how-to/make-videos/add-music
---

# How To Add Music To A Video?

Music plays under your whole video, in the editor's previews and in the MP4 you download or schedule.

## Steps

### Add a track

In the left menu, click **Audio**, then its **Music** tab. Click **Add music**, then pick a track from the music library or your uploads, or upload an MP3.

![Music in the Audio tab](https://postnitro.ai/docs/images/video/audio-tab.webp)

You need to be signed in to add music.

### Adjust it

Once a track is added, you can set:

- **Start at**: where in the track the video's music begins.
- **Volume**: how loud it plays.
- **Fade out**: how long it takes to fade at the end of the video.

A track shorter than the video starts again from the top.

### Cut slides on the beat

Click **Cut slides on the beat** to make every slide change on a beat of the music. PostNitro finds the track's tempo, then moves each slide's change to the nearest beat. A slide is never cut before its animations finish: it waits for the next beat instead. Each slide keeps the length the beat gave it, so click it again after you change the track, where it starts, or the slides.

Tracks without a steady beat, such as ambient music, can't be cut to one.

### Change or remove it

Click **Change track** to pick another one, or **Remove music** to take it off.

## Ask Nitro AI

On paid plans, ask Nitro AI in the AI chat to add music, change the track, take it off, make it quieter or louder, start it later in the track, fade it out, or cut the slides on the beat. Asked for music without a track named, it picks your newest and says which.

Nitro AI uses your workspace's own tracks only: it can't search the music library or upload one. Add a track in **Audio** first, and it can use it from then on.

> **Tip:** If you pick a track on the **Media** page first, **Audio** offers to use it in your video.