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# Factorio Prototype Docs Version 2.0.77

# AmbientSoundType - Prototype Docs

## AmbientSoundType :: union

Lets the game know in what instances the audio file is played.

#### Union members

`"menu-track"` | This track is only played in the main menu.
`"main-track"` | This track is played interleaved (alternating) with `"interlude"` tracks.
`"hero-track"` | This track is played when a character steps on a new surface for the first time. Only one `"hero-track"` per planet or space platform is allowed.
`"interlude"` | This track is played interleaved (alternating) with `"main-track"` tracks.

Type used in

- AmbientSound::track_type