This is called when you set the format on a bus.
- iOS 10.0+
- macOS 10.12+
- tvOS 10.0+
The proposed new format.
The bus on which the format will be changed.
trueif the new format will be set on the bus.
falseif the new format will not be set on the bus.
The bus has already checked that the format meets its channel constraints. The audio unit can override this method to check the format before allowing it to be set on the bus.
The default implementation returns
false if the audio unit’s
render value is