Sets the factors that affect the calculations of 3D sound.

BASS_Set3DFactors distf, rollf, doppf

Float
The distance factor... 0 or less = leave current... examples: 1.0 = use meters, 0.9144 = use yards, 0.3048 = use feet. By default BASS measures distances in meters, you can change this setting if you are using a different unit of measurement.

Float
The rolloff factor, how fast the sound quietens with distance... 0.0 (min) - 10.0 (max), less than 0.0 = leave current... examples: 0.0 = no rolloff, 1.0 = real world, 2.0 = 2x real.

Float
The doppler factor... 0.0 (min) - 10.0 (max), less than 0.0 = leave current... examples: 0.0 = no doppler, 1.0 = real world, 2.0 = 2x real. The doppler effect is the way a sound appears to change pitch when it is moving towards or away from you. The listener and sound velocity settings are used to calculate this effect, this doppf value can be used to lessen or exaggerate the effect.

This command does not return a value.

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