---
title: "absolute(dBSPL:)"
framework: realitykit
role: symbol
role_heading: Type Method
path: "realitykit/audioresource/calibration/absolute(dbspl:)"
---

# absolute(dBSPL:)

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

## Declaration

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

## Discussion

Discussion note: The -12dBLUFS reference level is achieved automatically by using Normalization.dynamic.