# Why does the music get quieter when someone talks?

That is auto-ducking. The music drops under the voice and comes back in the gaps, automatically — and because the duck follows your actual voice clips, it stays correct after you cut. Trim a minute of filler and the music re-balances itself. You never draw a volume envelope by hand. You can set how far it drops, or switch it off.

**Where:** Studio → select the music lane → inspector.

![The music level drops while the voice is speaking and rises back in the gap between sentences. The curve follows your voice clips, so it stays correct after you cut — you never draw it by hand. In the Studio the control sits on the music lane, shown as an Auto-ducking chip with its depth in dB.](https://mubert.com/tools/cast/docs-media/diagrams/what-is-ducking.svg)

In a timeline where the music is just an imported track, every edit to the speech can mean redrawing the volume automation by hand — auto-ducking does that for you.

If the music still feels loud under the voice, deepen the ducking and lower the music level — not the master, which just makes the whole episode quieter.

## The curve, in the Studio

The envelope runs along the top of the music clip. Depth is one number for the whole lane — change it and the curve follows everywhere at once. “Hide the curve” is a view setting; the music still ducks.

![The Auto-ducking chip on the music lane reads its depth in dB. Zoomed into the lane, the ducking curve runs along the top of the music clip, dropping where the voice comes in. One keystroke changes the depth and the whole curve follows; the popover’s “Hide the curve” toggle only hides the drawing.](https://mubert.com/tools/cast/docs-media/auto-ducking.mp4)

## Related

- [The music is too loud under my voice — what do I fix?](https://mubert.com/tools/cast/docs/music-too-loud)
- [How do I generate music for my episode?](https://mubert.com/tools/cast/docs/generate-music)
- [What LUFS should my podcast be?](https://mubert.com/tools/cast/docs/loudness-lufs)

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Source: https://mubert.com/tools/cast/docs/auto-ducking · Cast docs
Last updated: 2026-07-13