Author Topic: Engine Sound Intensity and Pitch (Read 382 times)

funked · « **on:** March 18, 2000, 04:06:00 AM »

Engine sound volume should vary with the throttle setting.

Engine sound pitch should vary with RPM.

Right now changing RPM does nothing, but changing throttle changes the pitch even though the RPM doesn't change!

Minotaur · « **Reply #1 on:** March 19, 2000, 12:14:00 PM »

Funked;

I have often thought along these lines, but I never really could find anything wrong with how the sounds are done now.

My Ideas for Engine Sounds:

An engine scream sound as your speed increases in addition to wind noise sound - Currently none
Allow the use of a different sound for an engine on WEP - Currently only the pitch for the existing engine sound changes

That was not too bad!

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Mino
The Wrecking Crew

Spatula · « **Reply #2 on:** March 19, 2000, 07:14:00 PM »

I agree with Mino

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Supreme Mega-Overlord Spatula

"...perfect for serving"

=357th Pony Express=

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funked · « **Reply #3 on:** March 19, 2000, 08:38:00 PM »

Mino said:

"I never really could find anything wrong with how the sounds are done now."

What I outlined in my first post, that's what's wrong with the sounds, compared to what a real plane sounds like.

These planes all had constant speed props which used a regulator to vary the prop pitch and keep the engine/prop RPM from changing. If everything is working right, the RPM does not change as you increase airspeed.

"An engine scream sound as your speed increases in addition to wind noise sound - Currently none"

It might sound "neato" that way but I'd rather have it sound as much like a real plane as possible, which is what I outlined in my first post.

[This message has been edited by funked (edited 03-19-2000).]

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Jinx · « **Reply #4 on:** March 20, 2000, 07:30:00 AM »

Yep, funked is absolutely right..
And since we are out of beta now I suppose it doesn’t hurt to point it out

I don’t know if it is possible with DirectX, but if it were I would love to have the amount of bas in the sound change with the load on the engine as well. A heavily loaded engine has a more ‘throaty’ sound, deeper and it vibrates more.

(hmm, I guess images in the sig is not allowed, but works if you edit the post..)
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www.flyingpigs.com

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funked · « **Reply #5 on:** March 20, 2000, 11:38:00 AM »

Yeah Jinx that would be great. Have you played Grand Prix Legends? The engine sounds in there are spectacular, varying with rpm and load.

Rocket · « **Reply #6 on:** March 20, 2000, 12:24:00 PM »

Just to make sure I understand what it *should* sound like. The prop pitch would change the pitch of the engine like running thru a gear in a car but the MAN would change the loudness of the engine and with a load it would lug like being at the bottom end of a gear? Is this even close?

S!

Rocket

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The Red Dragons
Fierce and Bold
With Honour and Courage
_______________________

www.reddragons.de

[This message has been edited by Rocket (edited 03-20-2000).]

Jinx · « **Reply #7 on:** March 20, 2000, 05:11:00 PM »

Funked, GPL is the only driving sim that managed to keep my interest.. Agreed, the engine sound in there gives the right feedback.

Rocket, right, you can look at the prop speed as the gearbox on a car (you set the prop speed, not the pitch directly with a constant speed prop). But with the prop it is more like driving on snow I suppose, not very good grip.

The difference is that in the plane the gearing will change all the time to keep the RPM constant, even if you go faster.

In high RPM it climbs and accelerates better, in low RPM you get better mileage.

The Throttle regulates the power within the limits of the available power at that RPM setting, too high a throttle setting on too low RPM with too low octane fuel will cause 'knocking' and eventually destroy the engine.
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www.flyingpigs.com

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Jinx · « **Reply #8 on:** March 20, 2000, 05:54:00 PM »

I forgot to put it in to context with the sound.

Changing from low to high RPM with a constant throttle setting would sound like accelerating from say 2000 to 4000 rpm in a car without moving the accelerator during the change.

The sound of increasing the throttle is the same as the sound of keeping the speed constant without changing gears while driving up a hill that is getting gradually steeper.

Rocket · « **Reply #9 on:** March 20, 2000, 06:37:00 PM »

Thanks

I thought I grasped the concept but couldn't get the words on the screen the same

I agree that this would make the game a lot more immersive

S!

Rocket

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The Red Dragons
Fierce and Bold
With Honour and Courage
_______________________

www.reddragons.de

[This message has been edited by Rocket (edited 03-20-2000).]

Jinx · « **Reply #10 on:** March 22, 2000, 07:07:00 AM »

One more thing that is not implemented right now, but that I think should be mentioned here..

The throttle also for obvious reasons affects engine rpm when the engine is not turning over fast enough for the prop governor to kick in, from idle up to the rpm setting where the prop pitch would start to increase. And the pitch takes a short time to settle after a throttle change, so when the throttle is increased fast the RPM would go up and then settle back to the correct setting.

It is also possible to over rev the engine in a dive, for the F4U I think the limit was 3600 rpm or so for a maximum of 30 seconds in a dive.

From a sound perspective, the prop blades, or rather tips, would start to generate more sound then the engine at a certain speed, a transonic prop is unbelievably loud..

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www.flyingpigs.com

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Duckwing6 · « **Reply #11 on:** March 22, 2000, 08:35:00 AM »

yea Jinx i'dlove to see that modelled .. also no prop governor can handle "slamming the throttle" that would give some neat effects

Wanker · « **Reply #12 on:** March 22, 2000, 09:04:00 AM »

Huh? Lemme see if I understand what funked said. If you increase throttle, the sound or pitch of the engine would not get louder unless there was an actual change in RPM?

If you punched the throttle, why wouldn't the RPM's increase?

Btw, I love Gran Prix Legends. That Ferrari engine sounded awesome!

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banana
308 (Polish) Squadron RAF "City of Cracow"
"On the whole, it is better to deserve honors and not have them than to have them and not deserve them"

Jinx · « **Reply #13 on:** March 22, 2000, 10:00:00 AM »

Quote

Originally posted by banana:
Huh? Lemme see if I understand what funked said. If you increase throttle, the sound or pitch of the engine would not get louder unless there was an actual change in RPM?

If you increase throttle the sound should get louder.

If you increase RPM there should be a rise in pitch.

Quote

If you punched the throttle, why wouldn't the RPM's increase?

On a constant speed prop the prop governor will keep the RPM constant under normal flying conditions.

-Jinx

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Wanker · « **Reply #14 on:** March 24, 2000, 01:06:00 PM »

Quote

On a constant speed prop the prop governor will keep the RPM constant under normal flying conditions.

If the RPM's of the prop stay the same, then how does the plane get the oomph to rumble down the runway and gather speed to takeoff?

Sheesh, I need a physics class. My degree is in Music Education.

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banana
308 (Polish) Squadron RAF "City of Cracow"
"On the whole, it is better to deserve honors and not have them than to have them and not deserve them"