# What is Fuse by Mubert?

Fuse is Mubert's AI editor for video: it scores short-form video with generated music and sound effects, ducks the audio under speech, and adds styled subtitles. Fuse and Cast share an engine and split by deliverable — Fuse makes short-form video, Cast finishes long-form episodes.

**Where:** mubert.com/tools/fuse

![The Fuse key visual: a stylized portrait with the FUSE wordmark — Mubert's editor for short-form video.](https://mubert.com/tools/cast/landing/ecosystem/card-fuse.webp)

The split is by what you are making. If the output is a video — a TikTok, a Reel, a Short, a talking-head clip — Fuse is the tool. If the output is audio you want to sound like a finished episode, Cast is.

They share the parts that matter: the same generative music engine, the same automatic ducking, the same subtitle generation.

Try it at mubert.com/tools/fuse — the free tier needs no card.

## Related

- [What is the Mubert API?](https://mubert.com/tools/cast/docs/mubert-api)
- [What is Mubert Render?](https://mubert.com/tools/cast/docs/render)
- [What is Cast?](https://mubert.com/tools/cast/docs/what-is-cast)

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Source: https://mubert.com/tools/cast/docs/fuse · Cast docs
Last updated: 2026-07-31