--- eq-xmms-0.6/src/iir.c	2004-05-16 06:24:31.000000000 +0400
+++ eq-xmms/src/iir.c	2005-03-22 16:14:58.000000000 +0300
@@ -167,7 +167,7 @@
      * the buffer (length is in bytes)
      */
     halflength = (length >> 1);
-    for (index = 0; index < halflength; index+=2)
+    for (index = 0; index < halflength; index+=nch)
     {
         /* For each channel */
         for (channel = 0; channel < nch; channel++)