5.1 front rear sound swapped issue

[itrdc5]

Hi all. I have a strange sound problem. Car engine sounds are coming from the rear speakers, which hey, if I drive the mid-engined Grp B cars, it's all good BUT the anti-lag exhaust noises are coming from the front speakers! :-(

Other games seem fine and speaker testing in Windows shows the correct speakers are allocated. My current workaround is just switch speakers to 2.1 mode but it's annoying remembering to switch via software. Is there a setting in RBR to switch the front and rear speakers?