The extremes of the flute range can be particularly challenging. Low notes often sound fuzzy (or not at all!) and high notes can sound like nails on a chalkboard. If you're having trouble maintaining consistently beautiful tone over the entire range of the flute without considerable effort, then maybe this will help...

Learn the subtle changes you need to make in your air speed and direction and embouchure as well as some simple exercises to include in your practice time to effortlessly hit those notes. Read it here...

https://www.theflutecoach.com/low-and-high-flute-notes/