remove "done" folders, label "bs/droneenter, bs/dronelook, and bs/dronevanish files and functions"

src/core1/audio/n_synstopvoice.c

@@ -0,0 +1,20 @@
+#include <ultra64.h>
+#include "n_synth.h"
+
+
+void    n_alSynStopVoice( N_ALVoice *v)
+{
+    ALParam  *update;
+    
+    if (v->pvoice) {
+        
+        update = __n_allocParam();
+        ALFailIf(update == 0, ERR_ALSYN_NO_UPDATE);
+
+        update->delta  = n_syn->paramSamples + v->pvoice->offset;
+        update->type   = AL_FILTER_STOP_VOICE;
+        update->next   = 0;
+
+        n_alEnvmixerParam(v->pvoice, AL_FILTER_ADD_UPDATE, update);        
+    }
+}