This isn't intended as an "idiot" question. I know that a tune that alters fuel pressure, timing, boost changes the explosions in the engine dramatically, thereby changing the noises they make. I am just looking for a better way to explain to someone why - or specifically which modification is responsible for making the engine sound louder or more old fashioned under some conditions such as light cruise. I suspect fuel pressure and vane position. But I learned at the dealer training that high fuel presssure in the Duramax is one of the things they used to quiet it. Now that I have increased the output and improved driveability, it sounds more "diesely". Is there something in the tune I could adress to smooth the sound back to stockish levels and still keep the ton of extra horsepower? Just trying to learn, have been doing lots of research, that's how I got it running good in the first place. Thanks!

B2206 "Desired Boost Levels With EGR Off (C)"
B2209 "Desired Boost Levels With EGR On (C)"
B2214 "Turbo Vane Target Position, EGR Off (C)"
B2215 "Turbo Vane Target Position, EGR On (C)"
B2224 "Turbo Vane Target Position Maximum (C)"
B2225 "Turbo Vane Target Position Minimum"
B0701 "Desired Idle Speed"
B1201 "Idle/Run mode"
B0720 "Main Injection Pulse"
B0721 "Main Injection Pulse (No Pilot)"
B0727 "Throttle Base Injection Quantity"
B0728 "Max Injected Fuel Quantity (Warm)"
B0910 "Injection Timing Base (C)"
B0929 "Injection Timing After Pilot Base (D)"
B0920 "Injection Timing Fuel Temp Multiplier"
B1101 "Peak Torque"
B1106 "Peak Torque vs RPM"
B1502 "EGR Maximum RPM"
B1503 "EGR Minimum RPM"