If you search for dolby headphone on youtube, there seems to be alot of mixes of a presumably similar (commercial) technique being used to encode the audio from

If you search for dolby headphone on youtube, there seems to be alot of mixes of a presumably similar (commercial) technique being used to encode the audio from some music that was recorded in 5.1 (https://www.youtube.com/watch?v=547i8RSveZs https://www.youtube.com/watch?v=547i8RSveZs).