Nope, no sound cones in the Skysong DC-6 soundset, Ted. Atleast not that i can hear... In my ears it still is the best set for a DC-6 but certainly not perfect. ( that means not anything like your magnificent set for the DC-3....

) It's mainly the volume at the transition from start-up to idle and from idle to more rpm. The start-up wav itself is great.
Nice external sound for the Convair, pity there's no good native FSX model for it. Certainly waiting for a dev to oblige. Sorely missing in FSX. Atleast we have a fairly good DC-6 now ( it's the best of the JF propliners if you ask me) but i can't wait for PMDG to finally get take-off clearance for their rendition.