Engine Simulator: produce realistic sounds from various engine parameters (opens in new tab)

(github.com)

90 pointsdtjohnnyb3y ago27 comments

27 comments

I wonder if this could be converted into a web application, maybe using WASM? I'm sure a lot of people here want to try it out on their own, but for me the build process is daunting as I haven't written C++ since college days. A web application would be very accessible.

blt3y ago

FYI, this software is Windows-only for now, but there appears to be an active effort to make it cross-platform: https://github.com/ange-yaghi/engine-sim/issues/2#issuecomme...

acutesoftware3y ago

The sounds generated by this are very impressive - it is an actual simulation of the entire combustion process.

Best parts are the engine sound under load, slight delay when opening throttle and changing down a gear to force engine braking.

ResNet3y ago

YouTube Demo: https://www.youtube.com/watch?v=RKT-sKtR970

jb_s3y ago

This is great, I'm watching the video on YouTube now...

Are exhausts/mufflers modelled?

For ages I've wanted to simulate different designs for exhaust headers and systems, to be able to possibly create different/interesting sounds from certain engines - i.e. can you add some additional headers with a different length and make an I4 sound like an I6?

tonmoy3y ago

If I recall correctly he modeled the acoustics of the exhaust using equalizers and filters, so not really simulated

xbar3y ago

A second simulator for exhaust systems would be appealing. Perhaps he will figure it out himself, or re-open source the existing simulation once he figures out how to get the credit/compensation he deserves.

1 more reply

chillel3y ago

I think you mean acoustics, not autistics =)

1 more reply

Cloudef3y ago

Could use convolution with recorded impulse response (IR) files to achieve realistic results for different exhausts.

1 more reply

_qua3y ago

This is so cool and it's amazing to me that a single programmer was able to do this as a hobby project. (To me it's magic, I know to some this a just a big project).

deburo3y ago

Absolutely amazing. I wonder, do games like GTA simulate those sounds as well, or is it pre-baked somehow?

mhh__3y ago

In games you get a better result for the cycles by cheating rather than doing a physical simulation.

Live for speed IIRC did have a fully synthesized engine sound but most games now have samples and some clever interpolation / synthesis as mentioned by others.

ehnto3y ago

Live For Speed also sounded pretty average, although it was still highly appreciated that they simulated it instead of fauxing give the type of game it was.

cammikebrown3y ago

GTA used a combination of pre-recorded real life audio and their own granular synthesis engine. (Granular synthesis uses sampling, but cuts up the samples into tiny pieces and processes them in various ways.)

avereveard3y ago

Automation Game (car tycoon) features engine design and stimulates sounds from a combination of individual parts snippets iirc as you move around you can hear the valve train clicking or the cylinder firing

65103y ago

It would be epic to make something for this guy.

https://www.instagram.com/foton_automotive/

npteljes3y ago

Further discussion:

"Simulating an Entire Car Engine (yes, it makes noise)"

https://news.ycombinator.com/item?id=32367979

blt3y ago

This is so cool. It makes me wonder what kind of amazing simulation software is behind closed doors in car companies.

Cloudef3y ago

Wish I was doing something interesting like this for a work, instead of working on boring SAAS stuff

j / k navigate · click thread line to collapse

27 comments

samtimalsina3y ago

blt3y ago

FYI, this software is Windows-only for now, but there appears to be an active effort to make it cross-platform: https://github.com/ange-yaghi/engine-sim/issues/2#issuecomme...

acutesoftware3y ago

The sounds generated by this are very impressive - it is an actual simulation of the entire combustion process.

Best parts are the engine sound under load, slight delay when opening throttle and changing down a gear to force engine braking.

ResNet3y ago

YouTube Demo: https://www.youtube.com/watch?v=RKT-sKtR970

jb_s3y ago

This is great, I'm watching the video on YouTube now...

Are exhausts/mufflers modelled?

tonmoy3y ago

If I recall correctly he modeled the acoustics of the exhaust using equalizers and filters, so not really simulated

xbar3y ago

1 more reply

chillel3y ago

I think you mean acoustics, not autistics =)

1 more reply

Cloudef3y ago

Could use convolution with recorded impulse response (IR) files to achieve realistic results for different exhausts.

1 more reply

_qua3y ago

This is so cool and it's amazing to me that a single programmer was able to do this as a hobby project. (To me it's magic, I know to some this a just a big project).

deburo3y ago

Absolutely amazing. I wonder, do games like GTA simulate those sounds as well, or is it pre-baked somehow?

mhh__3y ago

In games you get a better result for the cycles by cheating rather than doing a physical simulation.

Live for speed IIRC did have a fully synthesized engine sound but most games now have samples and some clever interpolation / synthesis as mentioned by others.

ehnto3y ago

Live For Speed also sounded pretty average, although it was still highly appreciated that they simulated it instead of fauxing give the type of game it was.

cammikebrown3y ago

avereveard3y ago

65103y ago

It would be epic to make something for this guy.

https://www.instagram.com/foton_automotive/

npteljes3y ago

Further discussion:

"Simulating an Entire Car Engine (yes, it makes noise)"

https://news.ycombinator.com/item?id=32367979

blt3y ago

This is so cool. It makes me wonder what kind of amazing simulation software is behind closed doors in car companies.

Cloudef3y ago

Wish I was doing something interesting like this for a work, instead of working on boring SAAS stuff

j / k navigate · click thread line to collapse