You need to make sure you've got the "engine sound" setting to "sport" - either by selecting full on sport profile or if you are using individual mode make sure you've got the sound setting....
Its not just the old soundaktor that sets, it changes the exhaust note (possibly through a ecu map setting, but nobody knows really).
With the sound setting its louder in D and pops and bangs on over-run downshifts in S.