The seismic changes in Brisbane's radio scene continue, with former breakfast radio king Spencer Howson stepping down from the breakfast slot.

ABC sources confirmed the move saying it was Howson's choice to move on from his long-held reign in breakfast radio.

"He isn't a morning person, and getting up that early takes its toll after a while," the source said.

The source also confirmed Howson would be staying with the ABC but a position had not been decided, nor had a replacement for his breakfast shift been announced.