I see a lot of people have upgraded the speakers in older games with great results.
I would think that one could add stereo effect or spatialization to the regular mono field in older games.
https://en.wikipedia.org/wiki/Precedence_effect
This way with the upgraded speakers one could have truly immersive audio whether from speakers or headsets.
Any thoughts on this little device?
https://www.amazon.com/Stereo-Simulator-Signal-Converter-Unassembled/dp/B00WO8I0ZS
Or another little device to put in-line from the source?