Jim Jordan points out that Daniel 3 lists seven ranks of Nebuchadnezzar’s officers, and also seven kinds of musical instruments.  The numerical link perhaps points to a connection of musical and political performance, musical and political “orchestration.”

Further, the word for “mighty man” (the Aramaic equivalent of gibbor) is used twelve times (suppressed in most English translations, but found in veres 8,  12 [2x], 13, 20 [2x], 21, 22, 23, 24, 25, 27).  And the story, of course, shows that the true mighty men are the Jewish ones, the mighty men who come from the twelve tribes.