This is a second version of internal engine sounds NK-8-2U for PT Tu-154B-2
The main deferences between this one and previous archive is:
1) Addition new sound of Idle.
2) It was a try to make smooth transition of sound from start up to Idle. Also, the sound become smoother on deferent regimes .
3) All sounds became quieter, in order to make it closer to original sound in a cabin.
Installation in Readme