The first commit

src/core1/done/audio/n_synsetpan.c

@@ -0,0 +1,27 @@
+#include <ultra64.h>
+#include "n_synth.h"
+
+void    n_alSynSetPan(N_ALVoice *v, u8 pan)
+{
+    ALParam  *update;
+    ALFilter *f;
+
+    if (v->pvoice) {
+
+        /*
+         * get new update struct from the free list
+         */
+        update = __n_allocParam();
+        ALFailIf(update == 0, ERR_ALSYN_NO_UPDATE);
+
+        /*
+         * set offset and pan data
+         */
+        update->delta  = n_syn->paramSamples + v->pvoice->offset;
+        update->type   = AL_FILTER_SET_PAN;
+        update->data.i = pan;
+        update->next   = 0;
+
+        n_alEnvmixerResampleParam(v->pvoice, AL_FILTER_ADD_UPDATE, update);        
+    }
+}