Documentation/Engine/Sound/Tires

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Sounds - Tires

This section is related to the sound of tires on different road substances.

Tire Sound Events

Tire sounds are kept separate for the truck tires and trailer tires, but both have the same events and parameters.
Currently there are 4 supported substances each with their own sound event:

  • asphalt
  • rumble
  • gravel
  • grass

Tire Sound Parameters

Sound parameters:

  • <name_of_event>/speed
    The parameter "speed" (km/h) controls the pitch and volume of the substance sound.
  • skid_speed
    The parameter "skid_speed" (m/s) represents the speed of wheel slip in either direction.
  • note
    The parameter "note" is present only for the "rumble" substance
    It is a frequency multiplier that is applied to the root note G and forming the melody for the singing road.

Engine Sound Configuration

The tire sounds paths are stored in these 4 soundrefs for truck:

	sound/tires/rumble.soundref
	sound/tires/grass.soundref
	sound/tires/gravel.soundref
	sound/tires/asphalt.soundref

and these 4 for trailer:

	sound/trailer/tires/rumble.soundref
	sound/trailer/tires/grass.soundref
	sound/trailer/tires/gravel.soundref
	sound/trailer/tires/asphalt.soundref


Example:

Content of the "sound/tires/rumble.soundref" is:

source="/sound/tires/tires.bank#rumble"

The location of the sound bank for the truck: "/sound/tires/tires.bank"
and sound bank for the trailer: "/sound/trailer/tires/tires.bank"