Function S_BeginRegistration

code/client/snd_dma.cpp:918–950

===================== S_BeginRegistration ===================== */

=====================
*/
void S_BeginRegistration( void )
{
	s_soundMuted = qfalse;		// we can play again

#ifdef USE_OPENAL
	// Find name of level so we can load in the appropriate EAL file
	if (s_UseOpenAL)
	{
		const char *mapname = Cvar_VariableString( "mapname" );
		EALFileInit(mapname);
		// clear carry crap from previous map
		for (int i = 0; i < EAX_MAX_FXSLOTS; i++)
		{
			s_FXSlotInfo[i].lEnvID = -1;
		}
	}
#endif

	if (s_numSfx == 0) {
		SND_setup();

		s_numSfx = 0;
		memset( s_knownSfx, 0, sizeof( s_knownSfx ) );
		memset(sfxHash, 0, sizeof(sfx_t *)*LOOP_HASH);

#ifdef _DEBUG
		sfx_t *sfx = S_FindName( "***DEFAULT***" );
		S_DefaultSound( sfx );
#else
		S_RegisterSound("sound/null.wav");
#endif
	}
}

#ifdef USE_OPENAL
static void EALFileInit(const char *level)