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FXLOUDNESS_PARAMETERS

Loudness parameters for the FXLoudness FXAPO, used with IXAPOParameters::SetParameters.

Syntax

Members

MomentaryLUFS
Type: double
Momentary loudness in LUFS. ShortTermLUFS
Type: double
Short-term loudness in LUFS. IntegratedLUFS
Type: double
Integrated loudness in LUFS. RangeHigh
Type: double
High end of the loudness range in LUFS. RangeLow
Type: double
Low end of the loudness range in LUFS. TruePeak
Type: float
Peak of the loudness range in decibels.

Remarks

Loudness Units relative to Full Scale (LUFS) is a synonym for Loudness, K-weighted, relative to Full Scale (LKFS). LUFS was introduced in EBU R128. Each LUFS unit is 1 dB. Loudness supports only FLOAT32 audio format at 48 kHz. You can insert this optional loudness metering effect using the CreateFX API. It allows you to track the loudness level of different voices. The loudness data is reported through Performance Investigator for XBOX (PIX).
PIX is installed only on developer kits and not on retail consoles.

Requirements

Header: xaudio2xbox.h Supported platforms: XBOX One family consoles and XBOX Series consoles

Conceptual documentation

See also

Getting started with XAudio2
PIX
xaudio2xbox
Last modified on August 20, 2026