em·bou·chure How wind players apply their mouth to their instrument.
This is the foundation for how we play and will effect your sound in all aspects which is why it’s so important. One of my teachers said that September is a great time to check in and go back to fundamentals and I couldn’t agree more.
It is generally agreed that a solid clarinet embouchure has: bottom lip firm against your bottom teeth; flat chin; corners of your lip in; firm upper lip. I have found the best way to work on embouchure is with a mirror and work on longtones. Watch for movement and try to keep the firm muscles localized at the mouth and not at the jaw. Once you have your mouth steady during longtones move onto more technical passages such as scales or studies.
Check out the video I’ve made to help: