Was listening to this last night. How do he get that sound? Is that his way of doing it or is it a super duper mouthpiece, the one I am searching for, or what? Come along ye meisters of the sax, let me know.
I've encountered a few old rockers who've used this technique- split the reed down the eaxct centre with a razor blade. Tried it myself- felt a bit like putting slight a chorus & distortion effect on my tenor.....At the time it was rumoured to be that a carefully split reed was used.