Summary
Get / Set Low Pass Filter does not appear to function at runtime
Description
An Audio Component contains a ‘Filter’ section in its Details, which includes a tick box to ‘Enable Low Pass Filter’ and place to set the ‘Low Pass Filter Frequency’. Ticking the box and setting a value can be observed to apply a low pass filter when playing the game.
There are also nodes available in Blueprints which appear to allow the user to get and set these options. For example, ‘Set Low Pass Filter Frequency’ and ‘Get Enable Low Pass Filter’.
It currently appears that if these are used within blueprints, they have no effect on an Audio Component at runtime.
Steps to reproduce
- Launch Unreal Editor 4.14.3.
- Create an instance of an Audio Component in any level.
- Access the Details pane for the Audio Component, and tick ‘Enable Low Pass Filter’.
- Edit the level Blueprint and configure a ‘Set Low Pass Filter Frequency’ node to adjust the frequency of the filter in the Audio Component.
- Play the game and cause the ‘Set Low Pass Filter Frequency’ node to trigger.
Expected Results
When in gameplay, triggering the ‘Set Low Pass Filter Frequency’ node should cause the frequency of the Low Pass Filter on the Audio Component to change.
Actual Results
The ‘Set Low Pass Filter Frequency’ node appears to have no effect on the frequency of the Low Pass Filter on the Audio Component when in gameplay.