-void S_Init (void);
-void S_Startup (void);
-void S_Shutdown (void);
-// 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);
-void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation);
-void S_StopChannel (unsigned int channel_ind);
-void S_PauseChannel (unsigned int channel_ind, qboolean toggle);
-void S_LoopChannel (unsigned int channel_ind, qboolean toggle);
-void S_StopSound (int entnum, int entchannel);
-void S_StopAllSounds(qboolean clear);
-void S_PauseGameSounds (void);
-void S_ResumeGameSounds (void);
-void S_SetChannelVolume (unsigned int ch_ind, float fvol);
-void S_Update(vec3_t origin, vec3_t forward, vec3_t left, vec3_t up);
-void S_ExtraUpdate (void);
-
-sfx_t *S_GetCached(const char *name, qboolean stdpath);
-sfx_t *S_PrecacheSound (const char *sample, qboolean complain, qboolean stdpath);
-void S_TouchSound (const char *sample, qboolean stdpath);
-void S_ClearUsed (void);
-void S_PurgeUnused (void);
-void S_PaintChannels(int endtime);
-void S_InitPaintChannels (void);
-
-// initializes cycling through a DMA buffer and returns information on it
-qboolean SNDDMA_Init(void);