enum SHAPE_MIXBUFFER_ATTENUATION    
{  
    SHAPE_MIXBUFFER_ATTENUATION_0_DB,  
    SHAPE_MIXBUFFER_ATTENUATION_6_DB,  
    SHAPE_MIXBUFFER_ATTENUATION_12_DB,  
    SHAPE_MIXBUFFER_ATTENUATION_18_DB,  
    SHAPE_MIXBUFFER_ATTENUATION_24_DB,  
    SHAPE_MIXBUFFER_ATTENUATION_30_DB,  
    SHAPE_MIXBUFFER_ATTENUATION_36_DB,  
    SHAPE_MIXBUFFER_ATTENUATION_42_DB  
}