There seems to be some confusion here as to what DES (digitally extracted stereo) is. It has nothing to do
with Duophonic or separated frequencies. It is a way to separate, using state of the art software, each element of an
original mono recording into seperate tracks. Each instrument, each vocal, background singers, etc. all now have
their own tracks. Basically, multi tracks have been created from the mono.
These are then remixed by professional audio engineers into true stereo. Some of the tracks on the new Eric CD's
over the last two years are jaw dropping. They duplicate the original 45 versions, in perfect sound quality, but now
in stereo. I have all of their releases from the last several years, and they are amazing.
Go to their website (in the original post) and listen to some or all of the samples. All that said, the "I Get Around"
on the new CD is NOT DES, just reconstructed stereo. Here's a track from one of their releases from last year.
The Kalin Twins "When" from 1958. Only in mono until this true stereo mix using DES was made last year.
https://www.youtube.com/watch?v=KPmQIlhOc4oTo hear the stereo best, listen through good speakers or headphones.