Open your jaw on open vowels, slowly. Do you know what an open vowel is? Most of the singers who come to me don’t know it clearly because, unfortunately, they have never heard of it. An open vowel is one that requires the jaw to be open. The most open vowel is A /a/. There’s also O /o/, È /ɛ/, Ë /œ/, EIN /ɛ̃/, AN /ɑ̃/, and that’s it. It’s not much, but still, we could spend our whole lives talking about it! And let’s not forget the closed vowels: ‘I’ /i/, ‘É’ /e/, ‘U’ /y/, ‘OU’ /u/, ‘ON’ /ɔ̃/. A