I’ve been re-reading the relevant sections of Gunther’s book The Swing Era prior to working on a possible post on Woody Herman, and was inspired to go roaming around looking for some Gunther links and videos - here are a few:

Gunther on recording The Birth of the Cool:

The first movement of his String Quartet Nr. 2 (I believe this is an early Emerson Quartet recording):

The Tanglewood Music Center Orchestra playing the first performance of Gunther’s Dreamscape in summer, 2012 is here. (The embed code at that page and WordPress seemed unable to cooperate.)

New Music Box and Do the Math interviews with Gunther.

Rifftides post on Gunther and Leonard Bernstein, including video of Gunther’s composition Journey Into Jazz.