https://www.youtube.com/watch?v=O7OJmERMqRA
B-24 P&W R-1830. Again, Engine 3 starts 1st, at about 40 seconds. Notice higher pitch, with more closely-spaced firing. It's harder to pick out each cylinder firing. Again, the exhaust note is dampened by the turbo plumbing.
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Notice that the exhaust note for both is very different than an engine with individual exhaust stacks, or stacks gathered together but still close to the cylinder heads. Engines with only a mechanical supercharger--and no turbine--would make more of a crack and pop.
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