Car | My Site 2

Technical
Reel.

Inside of
Wwise.

Overview

Car sound (Nissan R33 Skyline)
Turbo blow off
Backfires
Whooshes
Slapback delay
Tunnel reverb
Tire rolling (asphalt and dirt)
Skidding
Ambience

Reaper

I used Pole Position’s recording of a Nissan R33 Skyline for this project. In Reaper, I looked for several backfire, turbo blow-off, startup, and turning off sounds. I grabbed the rpm ramp up that sounded best to me. I separated the acceleration and deceleration and began mixing.

I mixed the engine recordings separate from the exhaust recordings. I used multiband compression to tame some of the frequencies that build up as the car accelerates. I automated distortion to ramp up as the rpm’s increase, helping to accentuate that the car has power!

I used some library recordings to create a dirt material, asphalt, and tire skid loops.

Wwise

Car Model (Granular)

Rev 2

I used Crankcase Audio’s “Rev 2” to build the audio model. I loaded in the accel and decel files, tagged the harmonics and sent them to the simulator.

Wwise

I started by adding the Rev plugin as a source generator and loading up my R33 model. I set up rtpc’s for throttle (controls on-load and off-load), gain, rpm, gear, and velocity.

On the main car sound, I added an eq that boosts the low end when rpm’s are low. This helps give a little bassiness when idling. I also used distortion that ramps up towards the top end of the rpm’s.

Turbo/Backfire

I have four different turbo blowoff intensities (off, low, medium, and high) inside a switch container. The switch is being controlled by a turbo psi parameter I created in-game. Each intensity has a random container with several variations inside.

The backfires are in a random container with several variations.

Tire Rolling

I have the “Asphalt” and “Dirt” as blend containers with a couple different speeds. They crossfade from slow rolling to fast depending on the car’s speed. I added a stereo delay that is acting as a doubler to add more width to the sounds.

I have a tire skidding sound that I turned into a loop. The volume is controlled in an rtpc relating to speed.

Ambience

The ambience I am using is ducking when the throttle is engaged (similar to sidechaining). It helps make the car feel louder and more powerful as if all other sounds are drowned out when on the gas. Since a keyboard’s input can only be a 0 or 1, I added a slew rate of 50 ms to make it a smooth transition. I also added an indoor/outdoor state that filters the ambience when going through the tunnel.

Whooshes

I used a random container with sounds I created using the Reaktor Whoosh plugin. This sound is triggered when passing objects over 30 mph. The whooshes pitch also increases with speed.

Slapback Delay and Reverb

For reverb and delay, I added an overall long slapback delay that helps make the car seem loud. I used two short slapback delays panned left and right, which will have their volumes controlled based on how close the car is to a wall. With Wwise’s roomverb, I used a cathedral preset to work as the tunnel.

Inside The
Blueprint.

*Click photos to enlarge

Turn Car On/Off

Toggle "F" to trigger car's on and off sfx. When turned on, Rev 2 event is delayed and faded in.

Turbo Main

I have the turbo blow off sound being played when throttle is released or when shifting up. The turbo timer is controlling how long it takes for the psi to spool up again. I used a curve to limit the psi max depending on rpm (low rpms can't have high psi).

Turbo PSI Func

This function is the turbo timer. The boost percentage variable is just for the UI.

Backfire

Backfire happens when rpm is over 5,000 and throttle is released. There is a 50% chance it will play. Backfire also plays when shifting up or down. There is a 33% chance it will play.

Tire Skid

The car did not have a traction variable, so I had to use timers and turning speed to trigger the skid sfx.

Ground Material

Used a line trace to get the physical material asphalt or dirt. The integer variable is so I can use it as a condition to stop skidding from happening when on dirt.

Idle Set Zero

Rev 2 plays an idle loop when at 0. Input value was always giving a small decimal, so this rounds anything below .05 to zero.

Slapback Delay & Whoosh

Events triggering the slapback and whoosh functions. Resetting on begin play.

Slapback Func

Multisphere line trace detecting the "slapback" channel. I have walls around the track, and your distance to them controls the level sending to the delay aux. There is a left and right delay.

Whoosh Func Pt. 1

Checking if speed is over 15 mph. Mutisphere trace looking for whoosh channel.

Whoosh Func Pt. 2

I created a variable for the array of Ak components being spawned. They have to be more than 1000uu apart (helps prevent spamming sounds).

True RPM & Rev Limit

I used a timeline to simulate a rev limiter. At 8000 rpm it will kick back to 7900 rpm in a couple ms. This is only effecting wwise rtpc. It goes back to the game's true rpm's if "not redlining".

Set Speed RTPC

Getting mph and normalizing to range to control wwise rtpc.

Unreal

Technical Reel.

Inside of Wwise.

Overview

Reaper

Car Model (Granular)

Rev 2

Wwise

Turbo/Backfire

Tire Rolling

Ambience

Whooshes

Slapback Delay and Reverb

Inside The Blueprint.

Technical
Reel.

Inside of
Wwise.

Inside The
Blueprint.