To maintain a column of air in the clarinet bore while respiratory out, the abdominal muscle mass must also be engaged, like if you are eliminating waste out of your bowels or guffawing very hard your abdomen tenses up. Also, the intercostal muscles for your ribs want to be tensed. These pull the rib cage upwards and outwards during inhalation so air can be exhaled into the clarinet bore for longer. Keep your self upright, especially your head if you want to constrict your airlines if bent over, but do not over tense your muscular tissues. When you are looking to take a breath try to do it out of the corners of your mouth so that you don’t have to readjust your whole mouth and embouchure with each breath . An clarification of what the embouchure is could be covered almost immediately. To start with, focus solely on the mouthpiece, ligature and reed and leave anything else of the tool to the side. Place the mouthpiece in your mouth and adjust your lips and cheeks as described in the phase on the embouchure above. Try to produce a continuing tone that doesn’t wobble change in volume or pitch by blowing in the course of the mouthpiece and follow doing this to build up some consistency. Obviously as a result of the rest of the clarinet is not connected the tone you produce will not always be in tune, but after some practice be sure you be capable of produce a C or C note. If that you could’t make a sound, make sure you are using a reed it is soft enough and also you are not puffing out your cheeks as you blow.