DTS DCH Config updated, added restore (DTS + Realtek SFX), in case E-APO is uninstalled (other).
If you are already using E-APO, simply run the configure.reg, and reboot.
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End result (DTS DCH):
[SPDIF]: E-APO (SFX) >> DTS APO4 - Realtek (MFX) >> DTS APO4 - DTS Encoder (EFX).
[Analogue]: E-APO (SFX) >> DTS APO4 - Realtek (MFX) >> DTS APO4 - Realtek (EFX).
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Note the config is essentially 'True Sound Stereo Surround' (+ Centre assist & LFE crossover).
Feel free to post your own config, or other, such as VST, ideally SFX only.