I've been trying to imitate Sonny Rollins tone on "You don't know what love is" (Saxophone Colassus). I wonder if anyone can suggest how to achieving that sound. His tone there has, to my ear, is strongly resonant and has a strong core, very vibrant. Take a listen. Suggestions? By the way a transcription is available in "Sonny Rollins: the Jazz Masters series" by Charley Gerad and published by Amsco Publications.