if anyone wants to hear what a great sax/clarinet player and virtuoso Jimmy Dorsey really was check out 'Fingerbustin' on youtube i promise you will be very impressed
Maybe an interesting note: through most of Dorsey's clarinet solo (mostly in the throat-tones) he has a very wide (markedly flat and slow) vibrado (characteristic of many players at that time). However, as he increases in range towards the end of the tune he looses his vibrado almost all together--it is not consistent. This is how I know his clarinet sound later; mid 1940's + , very shallow clarinet vibrado, almost imperceptible. Of course, as swing evolved vibrados became less wide.
Vibrato. By the way, as was common at the time, Jimmy played the Öhler clarinet (simple system with added bells and whistles to correct the intonation) and not the Boehm system that is pretty much universal today. Other famous players who used the Öhler model were Barney Bigard, Ed Hall and Gene Sedric (in the Fats Waller group).