diff --git a/html/changelog.html b/html/changelog.html
index 23ce94a8ef254..31bd3d8227659 100644
--- a/html/changelog.html
+++ b/html/changelog.html
@@ -55,6 +55,11 @@
-->
+
2 May 2018
+
Stakks updated:
+
+ - Added Polaris circuits.
+
4 April 2018
Stakks updated:
diff --git a/sound/machines/synth_no.ogg b/sound/machines/synth_no.ogg
new file mode 100644
index 0000000000000..b28629b1c72e6
Binary files /dev/null and b/sound/machines/synth_no.ogg differ
diff --git a/sound/machines/synth_yes.ogg b/sound/machines/synth_yes.ogg
new file mode 100644
index 0000000000000..d85f327582ad1
Binary files /dev/null and b/sound/machines/synth_yes.ogg differ