Sound is critical – they provide another level of immersion. Accurate sounds allow you to bring realism to your flightdeck. There are a few engine sound sets to consider including the free and fantastic Daniele V4 sound set (CFM and IAE engine sounds included, see resource section). There are also a few commerical soundsets in the market including BlueSkyStar.
They recently released an FSLabs IAE V2500 engine sound set for $10.50 and should be compatible with FMGS.
From the authors website:
It does not change the original FSLabs code or in any way interfering to it’s work.
In fact, it improves it a lot with conjunction to professionally made engine sounds.
All sound samples were recorder from real IAE V2500 with help of our pilot colleagues
in real operations and multiple run-ups. All volume and pitch data is 1 to 1 exact to IAE V2500
created with mathematical formulas and brought to represent the delight sound of IAE V2500.
It is also created with intent to be installed on professional FAA certified FTD throughout the USA.