diff --git a/.gitmodules b/.gitmodules
index 698c470..62e23ac 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "submodules/dsp"]
 	path = submodules/dsp
 	url = http://192.168.22.90:3001/jayfield/dsp.git
+[submodule "submodules/iir"]
+	path = submodules/iir
+	url = http://192.168.22.90:3001/jayfield/iir.git
diff --git a/submodules/iir b/submodules/iir
new file mode 160000
index 0000000..dd0f54d
--- /dev/null
+++ b/submodules/iir
@@ -0,0 +1 @@
+Subproject commit dd0f54d3bc783eda8af59155f995f333bf2c5601