Each year the event involves hundreds of students from New Zealand and Australia, and involves workshops, concerts, professional adjudication, local school performances and master classes.
Rhapsody Rotorua artistic director Grant Burns said the festival had become a distinctive annual music event.
"The gala tonight is unique because it combines all the schools and gives students the chance to perform alongside each other," Mr Burns said.
Group Events New Zealand representative Don Gunn said there was something for everybody.
"It's a family-friendly event and both kids and parents can enjoy the musical talent on offer," Mr Gunn said, adding tonight's gala was a culmination of the week's events.
"Audiences can expect a pretty full-on concert that displays a wide range of musical disciplines. It will be a really good evening."
Rhapsody Rotorua is supported by the Rotorua Energy Charitable Trust and managed by Group Events Pty Ltd.
Details
What: Rhapsody Rotorua.
Where: Rotorua Convention Centre.
When: Tonight, from 7pm.
Cost: Free.