Tyler from Echo 19 here, having worked specifically on the CFM engine sounds for the A340-300, I wanted to share some clarifying notes and reply to what's been said. Really appreciate the time and effort you’ve all put into the detailed feedback. 🙏
Engine Spool-Up / Correction:
Some of what’s being described here may not be a sound issue per se, but rather an engine modelling issue. The sound set is designed to follow the simulation data we’re given; if that data isn’t behaving quite right, you’ll hear it reflected in the audio response as well.
“Lack of Intensity” or Missing 3D Audio:
That definitely shouldn’t be happening. The buzzsaw, whine, and tonal build were very prominent on our end when designing the sounds, especially with all sliders maxed out. You may be running into a bug that’s muting or dropping certain sound layers. We will take a look to make sure nothing slipped into the release build that shouldn’t have. I've received reports that the 92%N1/low derate buzzsaw "pitch" is slightly too low, and I will gladly deploy a fix for it.
A340-300 vs A330/A320 Comparisons:
Worth noting that the A340’s CFM engines are quite different from the 320/330 family. Blade count, shape, and inlet geometry all change the acoustic profile significantly. The A340 does share some of that familiar CFM timbre, but specific nuances, like the “bleed valve rush” you mentioned, don’t exist on this airframe.
Cockpit/Cabin Transition Issues:
That sounds like another potential bug. Sometimes LOD culling can prevent certain sounds from loading correctly. If you’re able to capture a video of that transition, we’d be glad to add it to the internal report and get it sorted.
Ground Roll / Missing Layers:
Those should definitely be there. If you’re not hearing them, that again points toward a larger issue with disappearing sounds, possibly linked to the same 3D load bug. The internal engine soundstage is fully 3D, so we’ll investigate why your experience seems so different.
About Video References:
Random reference videos online can help get a general sense of a sound’s character, but they can also be misleading. Every clip someone sends us usually comes from a different seat, captured with a different camera, using a different mic, etc. Those variables can completely change the tone and balance of what’s being captured. We worked from high-quality, first-hand reference recordings to ensure that what you hear in the sim accurately reflects the actual acoustic behavior of the A340-300, not just how it sounds through a GoPro or an iPhone.
And lastly, regarding DeeJay’s feedback:
We love seeing passionate engagement. Our goal is always to refine and push realism further, but that process depends on accurate references and firsthand experience. The better the input, the sharper the result. Saying that the A350's experience is better is not helpful feedback, as the A350 is an entirely different aircraft altogether.
We’ll continue to refine the audio experience to ensure the A340 closely matches its real-life counterpart, given the time available.
Thanks again to everyone for taking the time to share constructive feedback and for your support. It really does help us improve our projects.
-Tyler