hi!
I have had an impression from RL videos that a engine sounds much louder when its rev is higher, not just the pitch is higher but the volume also (I wonder if that's true or just my hearing). So if this is truly the case then maybe we should have that in LFS too, cuz right now the volume of the engine sound is kinda constant at any rpm (again this could just be my hearing ).

By the way when I was driving in LFS and switch off the engine, I can still hea
r it running, and if I downshift then I can hear the blip of the throttle. Is this supposed to be? Cuz I thought when the engine is off you are not supposed to hear anything from it.

My guess is that what you're hearing is the gear whine and the gear change sound.

The engine is still turning if in gear so you can still hear it. Blipping the throttle opens the butterfly and makes the engine louder. This is what you're hearing. Press the clutch in and the engine will die when the revs drop

Quote from Davo :

The engine is still turning if in gear so you can still hear it. Blipping the throttle opens the butterfly and makes the engine louder. This is what you're hearing. Press the clutch in and the engine will die when the revs drop

yes the engine parts are moving, but there should be no ignition, so IMO there should be maybe a very indistinct hum quite different from what's heard when the engine is actually working, if anything at all.

And the throttle makes the engine louder even when it is swithed off? I don't know, but in LFS the blip sounds exactly like when the engine is on and I doubt that is correct.

Anyway what about the engine volume? I think since there are much more explosions, the volume should increase quite significantly as the RPM goes up. Currently in LFS only the frequency of the sound is increasing.

Sometimes simply increasing the volume is not feasible esp. for those with earphones, maybe LFS can dynamically lower the volume of other sounds so relative loudness is changed.

Quote from icyocean :

Sometimes simply increasing the volume is not feasible esp. for those with earphones, maybe LFS can dynamically lower the volume of other sounds so relative loudness is changed.

i like that idea

it would be nice to have engine louder at higher RPMs, but this is the real effect in life, when you get your engine up there in RPMs, you really can't hear anything else because of the engine's loudness

Another thing I noticed is that in TV mode in LFS, an approaching car sounds (IMO) kinda a bit too loud and a departing car sounds too quiet. In race videos a (close) racecar sounds kinda like a jetflight: as it comes towards the camera it sounds quite calm, something more like an echo from the surroundings; but as it turns and starts to pull away with its exhaust pipe now pointing towards the camera, it suddenly sounds really loud. I did not hear this in LFS, maybe in LFS the sounds are not yet directional?

doppler effect

it has it, and its powerfull, but its not right at all, when you hear a car go by (commute cars) really all you hear is wind displacement, in LFS you mainly hear engines

in race cars you hear a loud sound of the engine, and as it goes by you hear a VERY loud sound of deep exhaust, LFS can't seem to create that loud deep sound race cars make without having serious clipping

Quote from XCNuse :

doppler effect

it has it, and its powerfull, but its not right at all, when you hear a car go by (commute cars) really all you hear is wind displacement, in LFS you mainly hear engines

in race cars you hear a loud sound of the engine, and as it goes by you hear a VERY loud sound of deep exhaust, LFS can't seem to create that loud deep sound race cars make without having serious clipping

Is doppler effect mainly about the frequency of the sounds, not about the volume of them? I can hear the frequency change between an approaching car and a leaving one, but without the proper volume change.

Quote from XCNuse :

doppler effect

it has it, and its powerfull, but its not right at all, when you hear a car go by (commute cars) really all you hear is wind displacement, in LFS you mainly hear engines

in race cars you hear a loud sound of the engine, and as it goes by you hear a VERY loud sound of deep exhaust, LFS can't seem to create that loud deep sound race cars make without having serious clipping

No wind, but tires, those make load of noise we don't hear in LFS.

Also even if there would not be spark at engine braking engine surely is making sound as it is practically air pump pistons pumping air from intake to exhaust, compressing air in middle of process, so it does make sound even ignition is swithced off and throttle changes how it sounds, but surely it should sound different as currently it sounds same with ignition off and on.

oh right right right, my bad, meant tires there (was late last night)

and because of this, the knobbly tires should be louder on the tarmac than the hybrids, and the hybrids should be louder than the standars, and the supers should give a sticky sound (which would be hearing rocks and stuff being kicked up into the fender wells)

It doesn't have to do as much with the RPM as it does with the combustion. The larger the reaction in your engine, the louder it will be. Most fuel curves run lean at low RPM, and rich at high RPM. When you run lean, then the combustion is not complete. When you run too rich, the combustion also is not complete. So, the noisy-est RPM in real life is about mid rpm.

Quote from wheel4hummer :

It doesn't have to do as much with the RPM as it does with the combustion. The larger the reaction in your engine, the louder it will be. Most fuel curves run lean at low RPM, and rich at high RPM. When you run lean, then the combustion is not complete. When you run too rich, the combustion also is not complete. So, the noisy-est RPM in real life is about mid rpm.

It is also lot more dependant from throttle position than rpm, you can't run lean at WOT even in low rpm area.

Mechanical noise from engine will be larger part of sound at high rpm, also there is explosions much closer each other making sound louder. There are many sounds and some would be practical to make just a quite low volume background mess to give more feel to it (of course these should change volume and pitch with rpm too).