The future of the hugely successful Brisbane Baroque hangs under a cloud as details emerge that some performers are yet to be paid.

The festival was in its second year this year, attracting international performers to Brisbane to perform a program of the greatest baroque music in the world.

High note: Leo Schofield with member for Davidson, Jonathan O'Dea, and Jarrod Carland, at the launch of Sydney Sings. Credit:Louie Douvis

But now it appears many of the performers who participated in the 2016 festival are yet to be paid nearly two months after the event.

The allegations came as Brisbane Baroque's sister event, Sydney Sings, created by the same producing partnership, Jarrod Carland and Shannon Pigram, and helmed by empresario Leo Schofield, was postponed after Mr Carland became ill.