If the aperture in your lips is not centre, so slightly off to one side, that’s fine just make sure the flute embouchure hole is lined up in front of where the air leaves your lips.
Avoid pulling back the corners of the mouth. If anything they have a forward energy.
When viewed straight on in a mirror, the aperture in the lips won’t be seen, as the top lip is coming forward and slightly down.
The aperture in the lips shouldn’t be wider than the embouchure hole on the flute.
When blowing, angle slightly downwards over the forearm.
The flute sits just a smidge under the bottom lip. The lip needs to be able to move forward as you ascend through the registers.
The aperture in the lips should be a lovely elliptical shape.
Allow the bottom lip to spread out on the lip plate.
Keep the flute parallel to the lips.
This is the first in a series of posts regarding a basic flute embouchure. Each day as you do your tone exercises you could consider if this tip is of benefit to you and build up a picture of a good basic embouchure.
Cover only about 1/3 of the embouchure hole on the flute. Most of the sound comes out of the embouchure hole so let it out and avoid over covering.