diff --git a/files/ffcf.dsp b/files/ffcf.dsp
new file mode 100644
index 0000000..cf1b43a
--- /dev/null
+++ b/files/ffcf.dsp
@@ -0,0 +1,7 @@
+// import Standard Faust library
+// https://github.com/grame-cncm/faustlibraries/
+import("stdfaust.lib");
+
+// (t,g) = delay time in samples, filter gain 0-1
+ffcf(t, g, x) = (x@(t) * g), x :> +;
+process = _ * .1 : ffcf(100, 1);