Mack E6 Straight pipe sound v1.0

This mod is Mack 672ci ENDT and E6 engine straight pipe sound for Mack R Series by Harven,
Mack Superliner by Dielingwu and KSW, Mack F700 by KSW, and Mack MH613 by BPM

Version 1.0:
-Mack ENDT 673, ENDT 675, E6 and E6 maxidyne (EM6) 225-350HP with straight pipe sound
-Max Volume regulation for reduced chance of audio clipping and sound cutting
(Highly recommended to put engine, exhaust, turbo volume slider to max)
-Sound attenuation effects for realistic sound fade off from the distance
-Sound distortions and directional effects for realistic distortions from different positions around the truck
-Equal loudness contour and slight distortion simulation to simulate human hearing
-Included Customizable Additional Supported Trucks (CAST) in the mod