WmaLfxGfxDsp.dll is the .dll that hosts the inbox System Effects Audio
Processing Objects. You can read about how SysFX APOs work here:
These replace the concept of GFX filters (
which were a thing in Windows XP but no longer work since kmixer.sys was
removed in Windows Vista.
From: Chris Perry<mailto:chperry1@xxxxxxxxxxx>
Sent: Sunday, January 15, 2017 11:48 AM
Subject: [wdmaudiodev] Installing a GFX filter
The latest Windows installations have a global effects filter
Here is the driver stack for USB audio on my laptops.
It appears that this has been around since October 2013
I did a search on the Internet for what the purpose of this DLL is but came up
I have two questions.
1) What is the purpose of this DLL (possibly environmental audio for
2) If we develop a GFX filter will it install if there is already a GFX