diff -purN a/autotalent.c b/autotalent.c
--- a/autotalent.c	2014-03-29 21:11:49.788974495 -0500
+++ b/autotalent.c	2014-03-29 21:13:05.276978720 -0500
@@ -397,9 +397,14 @@ instantiateAutotalent(const LADSPA_Descr
 
   membvars->vthresh = 0.7;  //  The voiced confidence (unbiased peak) threshold level
 
+  membvars->inpitch = 0;
+  membvars->conf = 0;
+  membvars->outpitch = 0;
+
   // Pitch shifter initialization
   membvars->phprdd = 0.01; // Default period
   membvars->inphinc = (float)1/(membvars->phprdd * SampleRate);
+  membvars->outphinc = membvars->inphinc;
   membvars->phincfact = 1;
   membvars->phasein = 0;
   membvars->phaseout = 0;
@@ -765,9 +770,11 @@ runAutotalent(LADSPA_Handle Instance,
       fft_inverse(psAutotalent->fmembvars, psAutotalent->fftfreqre, psAutotalent->fftfreqim, psAutotalent->ffttime);
 
       // Normalize
-      tf = (float)1/psAutotalent->ffttime[0];
-      for (ti=1; ti<N; ti++) {
-	psAutotalent->ffttime[ti] = psAutotalent->ffttime[ti] * tf;
+      if (psAutotalent->ffttime[0]!=0) {
+	tf = (float)1/psAutotalent->ffttime[0];
+	for (ti=1; ti<N; ti++) {
+	  psAutotalent->ffttime[ti] = psAutotalent->ffttime[ti] * tf;
+	}
       }
       psAutotalent->ffttime[0] = 1;