diff --git a/.gitmodules b/.gitmodules
index 17a380e1..fe1d1f42 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -975,3 +975,6 @@
 [submodule "repos/CuteLab"]
 	path = repos/CuteLab
 	url = https://github.com/cutelabnyc/cute-vcv.git
+[submodule "repos/SignalFunctionSet"]
+	path = repos/SignalFunctionSet
+	url = https://github.com/stuart78/SignalFunctionSet.git
diff --git a/repos/SignalFunctionSet b/repos/SignalFunctionSet
new file mode 160000
index 00000000..03e03257
--- /dev/null
+++ b/repos/SignalFunctionSet
@@ -0,0 +1 @@
+Subproject commit 03e032577665f6b4725be52ae664fe8188a6ddb8