# How do I add sound effects?

Describe the sound and Cast generates it — a whoosh, a transition, an ambience. Ask for up to four variants in one run and keep the best.

**Where:** SFX page, or the "+" on a lane in the Studio.

**Plan:** Costs credits, priced per 5 seconds. Shown before you generate.

Sound effects are short, so generating a few variants and keeping the best is cheap and normal.

## Related

- [What costs credits?](https://mubert.com/tools/cast/docs/credits-cost)
- [How do I generate music for my episode?](https://mubert.com/tools/cast/docs/generate-music)

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Source: https://mubert.com/tools/cast/docs/generate-sfx · Cast docs
Last updated: 2026-08-18