How To Get 3D Positional Audio (HRTF & Ambisonics) in Serious Sam Fusion 2017
14INSTALLATION INSTRUCTIONS IN DESCRIPTION! Use headphones only with any virtual surround like Windows Sonic turned off.
For nearly two years, restoring 3D audio with OpenAL Soft in Serious Sam Fusion 2017 was thought to be impossible due to a software crossfeed mixer Croteam implemented. Fortunately, through helpful advice from "eksha" on the 3D Game Audio server on Discord, I learned that there actually was a console command that could re-enable HRTF.
#1----------------------------
DISABLING SOFTWARE AUDIO MIXER
Step 1: Go into your SeriousSam2017.ini located inside
C:\Program Files (x86)\Steam\userdata\YourUsername#\564310
Step 2: Look for dsd_iSoftwareProcessing = 1;
Step 3: Change it to dsd_iSoftwareProcessing = 0;
#2----------------------------
INSTALLING OPENAL SOFT
Step 1: Download the latest build of OpenAL Soft here.
https://openal-soft.org/
Step 2: Unzip the folder into %APPDATA% (use Windows key + R to find it).
Step 3: Go inside /bin/Win64 and rename soft_oal.dll to OpenAL32.
Step 4: Copy and paste the newly-renamed file into your Serious Sam Fusion 2017 directory, overwriting the old OpenAL32.dll.
#3----------------------------
SETTING UP HRTF (Headphones - Binaural Audio)
Step 1: Go back into your OpenAL Soft folder and double-click alsoft-config.exe inside the relevant folder.
Step 2: Make sure Stereo Mode is set to Headphones under Playback and HRTF is forced on in the HRTF tab.
#4----------------------------
SETTING UP THIRD-ORDER AMBISONICS (Surround Speakers)
Step 1: Go back into your OpenAL Soft folder and double-click alsoft-config.exe inside the relevant folder.
Step 2: Set Channels to Ambisonic, 3rd Order under playback.
Step 3: Select the Renderer tab and make sure all the boxes are ticked.
Step 4: Find your speaker setup and click the Browse box next to it. You must now select one of the following presets from openal-soft-1.19.1-bin/presets
Speakers---Preset
4.0--------square.ambdec
5.1--------itu5.1.ambdec
6.1--------hexagon.ambdec
7.1--------3D7.1.ambdec
#5----------------------------
FIX FOR MUFFLED AUDIO
Step 1: Go into your Advanced Speaker Properties.
Step 2: Untick Allow applications to take exclusive control of this device.
Step 3: Find another option that says Disable all enhancements somewhere in your speaker properties and tick it.
END---------------------------
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