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# absolute(dBSPL:)

The reference level (-12dBLUFS) of the audio source material will be reproduced at the given `dBSPL` level on known
audio output hardware.

```
static func absolute(dBSPL: Audio.Decibel) -> AudioResource.Calibration
```

## Discussion> Note: The -12dBLUFS reference level is achieved automatically by using `Normalization.dynamic`.

---

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