In Google Summer of Code 2025 there is an ambitious proposal to enhance the audio processing capabilities of the VLC media player through the implementation of advanced audio filters. One of the goals is to add LADSPA integration into VLC.
https://summerofcode.withgoogle.com/programs/2025/projects/c03UUkMf
The Linux Audio Developer's Simple Plugin API (LADSPA) is an application programming interface standard for handling audio filters and audio signal processing effects.
https://www.ladspa.org/