"Soul Thing" is the name of a library funk song by Tony Newman. Beck's band used as a quick intro to their show on PBS' Sessions at West 54th
in 1997. It was just a little dramatic build-up to Beck's introduction.
There is another version of the song by Keith Mansfield, called "Funky Fanfare." The two versions are very similar to each other, and to what Beck's band played. I am not clear whose version came first, or who wrote it, or whose version Beck knows.
Many bootlegs refer to this song as "D-Day Intro."