hisound
nosound
playvol
s_2dvolume
s_a3d
s_automax_distance
s_automin_distance
s_buffersize
s_disable_a3d
s_distance
s_eax
s_enable_a3d
s_geometry
s_max_distance
s_min_distance
s_numpolys
s_occfactor
s_refdelay
s_verbwet
speak
stopsound
ambient_fade
ambient_level