Smyth Research is a UK based company that makes headphone surround processors. I reviewed its originalA8 processor on this blog in 2010, and was thoroughly impressed by its ability to create truly immersive surround sound from stereo headphones. I’ve heard similar claims about Dolby Headphone, DTS Headphone:X, and countless other processors and apps, but in my opinion their promises never bore fruit. The original Smyth A8 did, and now there’s a new Smyth Realiser, the A16 which can produce up to 16 channels of sound over stereo headphones. With the A16 headphones, they no longer sound like headphones, they sound like the multichannel home theater speakers in your room!
,
Source: CNET