Constant rfmod::INIT_OCCLUSION_LOWPASS

pub const INIT_OCCLUSION_LOWPASS: u32 = 0x00000008;

All platforms - All SOFTWARE (and HARDWARE on 3DS and NGP) with 3D based voices will add a software lowpass filter effect into the DSP chain which is automatically used when Channel::set_3D_occlusion is used or the geometry API.