So I've been playing the alto sax for about 4 years. I play on an intermediate Antigua and I play on a E Rousseau with Vandoren reeds size 3 reeds with a Rovner ligature. I've always been told my tone sounds "nasally", some days more than others. My director tells me to voice "ahh" so my throat will be more open but it shows no significant change, I've also tried Rico Hemke reeds and no difference. So I was wondering any suggestions on how I can improve my tone instead of it being nasally?