// S_StartSound returns the channel index, or -1 if an error occurred
int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation);
// S_StartSound returns the channel index, or -1 if an error occurred
int S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation);