The programme begins with Carmina Burana, which starts with O Fortuna, Verdi's Ave Maria and the popular Deutsche Messe composed by Franz Schubert.
The National Library had to order in the sheet music for Deutsche Messe especially for the performance and the choir had spent months learning German for the concerts.
"The choir has been working on that and at the same time we've been gathering the instruments and finding suitable workshop times. A couple of Saturdays ago was the first time we all came together.
"It's been a huge amount of work," Mr Heath said.
"The music itself is interesting but difficult to get hold of. To experience O Fortuna live is interesting. Usually it's only where there are large choirs or large ensembles so this is something quite special."
Details
What: Rotorua Lakes Instrumental Ensemble & Rotorua District Choir.
When: Tomorrow, 7.30- 9.30pm, Sunday, 2-4pm.
Where: St Lukes Anglican Church, Amohia St.
Cost: $20, door sales only, children free.