Fix fake timing.
diff --git a/simulator/wrapsim/DevAudio.c b/simulator/wrapsim/DevAudio.c
index 752ee65..af7a950 100644
--- a/simulator/wrapsim/DevAudio.c
+++ b/simulator/wrapsim/DevAudio.c
@@ -83,7 +83,7 @@
         return _ws_write(state->fd, buf, count);
 
     // fake timing
-    usleep(count * 10000 / 441 * 4);
+    usleep(count * 10000 / (441 * 4));
     return count;
 #endif
 }