[DirectX 5 Programmer's Reference] Rolloff Factor (61.3663101604278%)

DirectX Foundation > DirectSound > DirectSound Essentials > DirectSound 3-D Listeners

[DirectX 6 Programmer's Reference] Rolloff Factor (61.3663101604278%)

DirectX Foundation > DirectSound > DirectSound Essentials > DirectSound 3-D Listeners

[DirectX 7 Programmer's Reference] Rolloff Factor (61.3663101604278%)

Microsoft DirectX 7.0 > DirectSound > DirectSound Essentials > DirectSound 3-D Listeners

[DirectX 8.1 C/C++ Programmer's Reference] Rolloff Factor (55.030701754386%)

DirectX 8.1 (C++) > DirectX Audio > Using DirectX Audio > 3-D Sound > DirectSound 3-D Listeners

[DirectX 8.1 Visual Basic Programmer's Reference] Rolloff Factor (55.030701754386%)

DirectX 8.1 (Visual Basic) > DirectX Audio > Using DirectX Audio > 3-D Sound > DirectSound 3-D Listeners

[DirectX 3 Programmer's Reference] Rolloff Factor (49.9006759962049%)

DirectSound > DirectSound Interface Overviews > IDirectSound3DListener Interface