diff --git a/README.md b/README.md
index fe2b7e1..8975319 100644
--- a/README.md
+++ b/README.md
@@ -663,7 +663,6 @@ sources
 - `pluck(float, float, float)` (frequency, gain per sec, high freq damping) input is string excitation signal
 - `mls([float])`
 - `ramp()` ramp from 0 to 1 at input freq (phasor)
-- `clock()` simple clock with 50% duty cycle (just a `sine() >> >(0)`)
 
 filters
 - `allpole()`
diff --git a/src/functions.rs b/src/functions.rs
index a3fb4b9..260b7e1 100644
--- a/src/functions.rs
+++ b/src/functions.rs
@@ -185,7 +185,6 @@ pub fn str_to_net(op: &str) -> Net32 {
             } else { return Net32::wrap(Box::new(soft_saw())); }
         }
         "ramp" => { return Net32::wrap(Box::new(An(Ramp::new()))); }
-        "clock" => { return Net32::wrap(Box::new(sine() >> map(|i: &Frame<f32,U1>| if i[0] > 0. {1.} else {0.}))); }
 
         // -------------------- filters --------------------
         "allpole" => { return Net32::wrap(Box::new(allpole())); }