I checked out that link.
What you missed was an extremely fishy bit of flash animation.
So under the web site heading "credits" you have vague (can you believe that?) allusions to being involved with Michael Green Design is "associated" with these fine musicians, that for "20 years" his tuning philosophy has helped bring us some of today's greatest music, his room tunes have been used by "countless" musicians including legendary artists...
And then flash animation shows a long list of artists that include:
The Beatles, Miles Davis, Moody Blues, Lois Armstrong, Queen, Moody Blues, Rolling Stones, Roy Orbison...
Now, I'm left to wonder how someone's 20 year old tuning philosophy has anything to do with The Beatles, Miles Davis Louis Armstrong and those others.
And what services did Michael Green actually render to all the bands mentioned?
One is left with the exceedingly fishy smell that someone's credentials and involvement have been inflated, and that the page relies on vague enough implications of association that people will put his work together with those artists.
But I'm certainly open to finding out I'm incorrect, if Michael would supply detail as to how his work played a part with the above mentioned artists.