Index: apps/codecs/libtremor/window.c
===================================================================
--- apps/codecs/libtremor/window.c	(revision 20728)
+++ apps/codecs/libtremor/window.c	(working copy)
@@ -68,11 +68,15 @@
   long rightbegin=n/2+n/4-rn/4;
   long rightend=rightbegin+rn/2;
 
-  memset((void *)&d[0], 0, sizeof(ogg_int32_t)*leftbegin);
-  /* mcf5249_vect_zero(&d[0], leftbegin); */
+//  Following memset is not required - we are careful to only overlap/add the
+//  regions that geniunely overlap in the window region, and the portions
+//  outside that region are not added (so don't need to be zerod). see block.c
+//  memset((void *)&d[0], 0, sizeof(ogg_int32_t)*leftbegin);
+
   vect_mult_fw(&d[leftbegin], &window[lW][0], leftend-leftbegin);
   vect_mult_bw(&d[rightbegin], &window[nW][rn/2-1], rightend-rightbegin);
-  memset((void *)&d[rightend], 0, sizeof(ogg_int32_t)*(n-rightend));
-  /* mcf5249_vect_zero(&d[rightend], n-rightend); */
+
+//  Again - memset not needed
+//  memset((void *)&d[rightend], 0, sizeof(ogg_int32_t)*(n-rightend));
 }