hi i was wondering how to maintain good tone on high notes? Usually i get ugly tone on Ehh vowels and aw and i is there any way you can help me??

Hi, Jace! Are there other vowels that produce a better tone for you on high notes? If so, I'd add a "shade" of that vowel into the problematic vowel. For example, I sound overly nasal and constricted singing an EE on a high note. I add a "shade" of AH to EE, so it sounds more like IH.