How can I make my voice more flexible?
Hello there! I've been studying classical singing for 8 years now, I am a Mezzo Soprano, I have a pretty good range (can go pretty low and high too) and my voice has a quite deep, dramatic, sometimes even heavy and loud sound. I was happy with how my voice sounded, until now... I'll explain: So after the summer exams that took place, the principal of the conservatory told my teacher that I need to make my voice more flexible and light it up a bit, because it tends to get quite dark and heavy and this actually blocks the flexibility of my voice. Ever since I've been thinking about how am I going to make my voice more flexible, what exercises are going to help me, so I can practice during the summer and get a more desirable form, until the conservatory opens again in autumn. I'll take consideration in any advice you give me. My aim is to get better and better with time! Thank you all in advance!
P.S. excuse me if my writing isn't the best, English is not my first language :,)