LEAD SOUND DESIGNER · TECHNICAL AUDIO · COMPOSER

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TECHNICAL AUDIO · DEADLINE DELIVERY

Velocity-driven Doppler system

I built the vehicle Doppler system in Unreal Engine 5, calculating motion relative to the player and sending the result to a Wwise RTPC for a responsive pitch shift.

In game

Pitch rises on approach and falls as the vehicle passes the listener.

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Blueprint logic

Listener direction

Subtract car position from player position, then normalize the direction.

Relative velocity

Subtract player velocity from car velocity so both moving bodies affect the result.

Radial speed

Project relative velocity onto the listener direction with a dot product. The sign distinguishes approach from recession.

Wwise control

Scale and clamp the result from −10 to 10, then set the car’s Doppler RTPC with 150 ms interpolation.

Expanded Unreal Engine Blueprint calculating listener direction and emitter relative velocity before setting a Wwise Doppler RTPC