diff --git a/src/check/calc_checksum.c b/src/check/calc_checksum.c
new file mode 100644
index 000000000..8e13eb6dd
--- /dev/null
+++ b/src/check/calc_checksum.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+
+int main(int argc, char** argv) {
+  if (argc<2) {
+    printf("usage: %s text\n",argv[0]);
+    return 1;
+  }
+
+  unsigned int checker=0x11111111;
+  unsigned int checker1=0;
+  int index=0;
+
+  for (char* i=argv[1]; *i; i++) {
+    checker^=((unsigned int)(*i))<<index;
+    checker1+=(unsigned int)(*i);
+    checker=(checker>>1|(((checker)^(checker>>2)^(checker>>3)^(checker>>5))&1)<<31);
+    checker1<<=1;
+    index=(index+1)&31;
+  }
+
+  printf("%.8x %x\n",checker,checker1);
+
+  return 0;
+}
diff --git a/src/gui/settings.cpp b/src/gui/settings.cpp
index 4b5d88899..e157ac871 100644
--- a/src/gui/settings.cpp
+++ b/src/gui/settings.cpp
@@ -3096,6 +3096,14 @@ void FurnaceGUI::drawSettings() {
               mmlString[30]="enabled all instrument types";
               settings.displayAllInsTypes=!settings.displayAllInsTypes;
             }
+            if (checker==0x3f88abcc && checker1==0xf4a6) {
+              mmlString[30]="OK, if I bring your Partial pitch linearity will you stop bothering me?";
+              settings.displayPartial=1;
+            }
+            if (checker==0x8537719f && checker1==0x17a1f34) {
+              mmlString[30]="unlocked audio multi-threading options!";
+              settings.showPool=1;
+            }
 
             mmlString[31]="";
           }