Low quality of engine sound after update to DCS 2.5.4.26552

[VanZan]

Hello.

 

After update DCS from 2.5.3.24984 to 2.5.4.26552 the sound of engins became uninformative in the cabin.

 

Especialy for L-39C. For example, now I can't hear the diffence between 90% and 106% engine speed ( looks / sounds like nothing changed ).

 

Plus, the sound has become more "dirty / dull" (lost surround / saturation) in the cabin.

 

My teammates confirme the problem.

 

I created sound composition between DCS versions for illustrative example:

 

 

Please, look at.

Edited January 30, 2019 by VanZan

[Emmy]

FWIW, they did the same in the A-10C. Engine pitch fades away behind you as you accelerate down the runway until all you’re left with is white noise. I’m told that A-10 pilots can most definitely hear their engines through the helmet. It makes it a bitch to make power adjustments in formation and when joining on a tanker.

[btd]

The dynamics of the sound for L-39 high rpm has changed. Let's wait for the update. Now, at high RPM, the changes must be heard. As for the A-10 at high speeds, the sound of the compressor should be barely audible. Sound level may have been excessively reduced, now it's corrected. Thanks for your report.

[ac5]

FWIW, they did the same in the A-10C. Engine pitch fades away behind you as you accelerate down the runway until all you’re left with is white noise. I’m told that A-10 pilots can most definitely hear their engines through the helmet. It makes it a bitch to make power adjustments in formation and when joining on a tanker.

 

Indeed.....

 

See also:

 

https://forums.eagle.ru/showthread.php?t=230832

[Emmy]

The dynamics of the sound for L-39 high rpm has changed. Let's wait for the update. Now, at high RPM, the changes must be heard. As for the A-10 at high speeds, the sound of the compressor should be barely audible. Sound level may have been excessively reduced, now it's corrected. Thanks for your report.

 

 

I have it on first-hand knowledge from A-10 drivers at DM AFB in Tucson, AZ that this is not the case. The engine noise does not fade away to nothing at speed.

[SonofEil]

Technically that's second hand knowledge. :)

But I have the same. The A-10 buzz saw/drone noise is quite audible to the pilots. Wind noise of course increases with speed, but they can always hear and make adjustments based on the sound of the engines.

[Emmy]

The notion that the engine note would fade with speed is ridiculous given that the engines are the same distance from the pilot whether it's parked or flying 300kts...

The whine comes from the blades at the front and not the exhaust.

[SonofEil]

Yeah the A-10 out-flying it's own engine sounds is pretty ridiculous. But in many aircraft the aerodynamic noises at high speeds (canopy and airframe wind noise mostly) can drown out/mask/muddle distinct engine sounds. It just happens this isn't the case with the A-10. Again though, second hand knowledge on this airframe.

 

As for the A-10 at high speeds, the sound of the compressor should be barely audible.

 

I sort of agree? But only because the compressor itself on a TF-34 should be virtually inaudible to begin with. The audible parts on that engine are usually the fan and shaft bearings up front, and wind turbulence combined with the LPT and (to a lesser extent) HPT at the rear. This is first hand knowledge. :)

Edited January 31, 2019 by SonofEil

[btd]

Dear all, I think you are right, and the engine sound volume at high speed has been changed for a-10. Please wait for the update.

But, it is better to hear than 10 times to read :) I would be very grateful if youtube or your familiar pilots could provide an audio recording where we can clearly hear the change in the engine at high RPM in the air. Thanks

 

And please look at this video

There is a very bright sound of the compressor at the start, which disappears almost completely at speed. Of course, we can't judge by one video, but its recording quality is quite good.

Edited January 31, 2019 by btd

[Emmy]

Whether it’s entirely accurate or not really isn’t the most relevant aspect. In the real jet, in addition to sound, you have vibrations, stick pressures and G forces that “talk” to you to give you a sense of what the Jet is doing. We don’t have those forces as feedback in a sim so at least give us the one telltale that does work and that’s engine pitch.

[VanZan]

The dynamics of the sound for L-39 high rpm has changed. Let's wait for the update. Now, at high RPM, the changes must be heard.

 

Thanks!

 

And what's about return the old and more clean engine sound in the cabin for L-39?

 

For now, it looks like you added some kind of special effects, like a "white noise" or "hissing". So the sound became little quieter and not impressive like it was before.

[btd]

The sound in the DCS should not be impressive. It should be realistic :)

The current version almost identically reflects the real audio records from the L-39 cockpit , which we have.

 

If you have other good quality recordings that indicate the current sound's error, please show us. We will definitely fix the sound in accordance with the reference.

[btd]

By the way, you can always turn on the "hear like in helmet" option. This will save you from a hissing sound in the cockpit.

[ac5]

See also:

 

https://forums.eagle.ru/showthread.php?t=230832&page=3

[btd]

The sound and dynamics of its change from speed is changed. Please wait for the next update.

[ac5]

Hi btd, thank you very much for the reply. Looking forward to it.

Still don’t understand why that sound has been busted, it was perfectly OK before.

[ac5]

The sound and dynamics of its change from speed is changed. Please wait for the next update.

 

Just updated to STABLE DCS version 2.5.4.30386

This issue is STILL not fixed.

Is it really so difficult?

Was perfectly OK in 2.5.3

[btd]

I can not confidently say whether the sound fix got into the update. Maybe it will be in next one. But I can say for sure that there will be no old sounds. Perhaps for you they are perfect. But we always try to get closer to the real sound, regardless of whether it is perfect. That's why we are respected and appreciated. We are moving forward, getting new information and trying to do better in accordance with it. If you have any real good quality recordings with which we can improve something, please share them.

You can always keep the sounds from the old versions.

[ac5]

I can not confidently say whether the sound fix got into the update. Maybe it will be in next one. But I can say for sure that there will be no old sounds. Perhaps for you they are perfect. But we always try to get closer to the real sound, regardless of whether it is perfect. That's why we are respected and appreciated. We are moving forward, getting new information and trying to do better in accordance with it. If you have any real good quality recordings with which we can improve something, please share them.

You can always keep the sounds from the old versions.

 

Hello btd, thank you for your reply.

 

I have nothing against new sounds / closer to the real sound, as long as they are better...

 

But a turbine sound wich INEXPLICABLY gets quieter with more throttle / speed???

 

You write that I can can always keep the sounds from the old versions...

Well, would you be so kind to tell me how I d can do that? The sounds of the A-10C are scattered in many folders, /Mods /Sounds / etc....

[btd]

But a turbine sound wich INEXPLICABLY gets quieter with more throttle / speed???

Hello,

I have provided a reference video. You give me only your words. We can not change the sound picture as someone from the users wants. We make sound the way it should be in real life. If you have other reference video or audio recordings indicating that the sound is not correct - please provide and we will fix it. We cannot change anything from your words.

According to our current references, the turbine is really faint in flight. Please provide reference audio or video where the turbine is heard well in the cockpit.

 

Compare with you version, maybe you don't have the latest updates.

You can try "Hear like in helmet" option. Perhaps it would be better to hear the turbine. That's what I have at the moment (in a helmet): https://yadi.sk/d/bWzYlfb3LhK4bA

Without this option: https://yadi.sk/d/WUgEtPqbsZII0g

It is the record of the cockpit sound in the air after takeoff. Of course, if the speed is high, then the sound of the wind will increase

 

You can always revert your DCS to the version you like and dont't get the updates.

Edited May 17, 2019 by btd

[The Falcon]

That's what I have at the moment (in a helmet): https://yadi.sk/d/bWzYlfb3LhK4bA

Without this option: https://yadi.sk/d/WUgEtPqbsZII0g

It is the record of the cockpit sound in the air after takeoff. Of course, if the speed is high, then the sound of the wind will increase

 

You can always revert your DCS to the version you like and dont't get the updates.

 

 

I think there is a basic problem with the helmet track. The high-pitched sound is too loud, I don't know how to explain it but using headphones I feel almost pain. Considering that it is a modified sound to make it look like a sound passing through the helmet, I think I can make a consideration. From what I know in physics, the low frequencies pass more easily through the materials and the high freq are repelled or absorbed, so the power of the high pitched sound inside the helmet must be lower than the bass.

[btd]

The high-pitched sound is too loud

 

:lol:

For you it's too loud, for AC5 it's too quiet.

Well....again, please only references and compares.

[ac5]

Whether it’s entirely accurate or not really isn’t the most relevant aspect. In the real jet, in addition to sound, you have vibrations, stick pressures and G forces that “talk” to you to give you a sense of what the Jet is doing. We don’t have those forces as feedback in a sim so at least give us the one telltale that does work and that’s engine pitch.

 

Completely agree!

[ac5]

:lol:

For you it's too loud, for AC5 it's too quiet.

Well....again, please only references and compares.

 

Hello btd, for me is tto quiet ONLY at high rev / throttle...

 

But tell me, can you kindly reply what I was asking:

 

You write that I can can always keep the sounds from the old versions...

Well, would you be so kind to tell me how I d can do that? The sounds of the A-10C are scattered in many folders, /Mods /Sounds / etc....

[The Falcon]

:lol:

For you it's too loud, for AC5 it's too quiet.

Well....again, please only references and compares.

I didn't explain myself well, I didn't mean the sound of the engines, that's quite ok, I mean the high and constant sound. I don't know where it comes from but it doesn't look like engines, it's more like instrument noise. Here is what is too strong(high) using earphones. Now being the high freq reflected by the helmet one should not feel so strong.

I'm starting to think that my ears are too sensitive to high-pitched sounds, but I wonder how pilots endure that sound.