Sound pipe or Active Sound, it's all to produce the same result! More of the engine sounds people like inside the cabin while removing the unwanted sounds. Some people make it sound as though all engine noise you hear (in cars with active sound) is coming from the speakers. That's simply not the case, you'll hear real sounds and it's difficult to detect if and when they're being amplified with active sound. You'd need to be able switch active sound on and off to tell any difference.
Nothing happens if you blast music and rev the engine? You hear loud music and your engine rev. Lol, most of the people that have the most issues with Active Sound obviously haven't experienced it. It's just the thought of engine sounds coming though speakers that have them complaining.
2014 BMW ///M6 Coupe
2011 Audi R8 V10 - sold
2010 Dodge Viper ACR Vooodoo Edition - sold
2010 Corvette ZR1 - sold