UAudioComponent::LowPassFilterFrequency

property Engine Blueprint Since unknown

#include "Components/AudioComponent.h"

Access: public Specifiers: UPROPERTYEditAnywhereBlueprintReadWrite

Description

Cutoff frequency in Hz for an additional low-pass filter applied to this voice, active only while bEnableLowPassFilter is set. A value of 0.0 matches the device sample rate and effectively bypasses the filter.

Caveats & Gotchas

• Editing this directly on the component only has an effect if bEnableLowPassFilter is also true — the EditCondition hides the field in the Details panel otherwise, but setting it via C++/BP with the flag off is silently ignored at playback.
• This is one of several LPF contributors (attenuation, occlusion, this override); the engine always applies the lowest cutoff frequency among them, so raising this value won't undo a tighter filter set elsewhere.
• Changing the value after the sound has started playing does not retroactively update the active sound — call SetLowPassFilterFrequency() at runtime instead of writing the property directly.

Signature

float LowPassFilterFrequency

Example

Enable and set a low-pass cutoff C++

AudioComponent->bEnableLowPassFilter = true;
AudioComponent->LowPassFilterFrequency = 800.0f;
AudioComponent->Play();

Version History

Introduced in: unknown

Version	Status	Notes
5.6	stable	—

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