diff --git a/dev/src/dsp-definitions/44-c4-blops.ts b/dev/src/dsp-definitions/44-c4-blops.ts
index 7f49dfa..153f802 100644
--- a/dev/src/dsp-definitions/44-c4-blops.ts
+++ b/dev/src/dsp-definitions/44-c4-blops.ts
@@ -2,7 +2,30 @@ import type { DspDefinition } from "../types";
 
 const dsp = `
 import("stdfaust.lib");
+
+// consts
+peak = 0.65;
+threshold = peak * 0.02;
+
+// utils
+zero_crosses(x) = (x' > 0) != (x > 0);
+crossed_up(x) = (x' < 0) & (x >= 0);
+
+// process
 input = _;
+
+is_note_on = _ : an.amp_follower_ar(0.00001, 0.01) > threshold;
+
+devfn(x) = crosses,cycle
+with {
+  note_on = is_note_on(x);
+  crosses = x : *(note_on) : crossed_up;
+  crosses_on = crosses + (1 - note_on);
+  cycle = ba.countup(10000, crosses_on') : ba.sAndH(crosses_on);
+};
+
+dev_crosses_on = _ : devfn : _,!;
+dev_cycle = _ : devfn : !,_;
 process = _ <: _,_;
 `;
 
@@ -15,8 +38,9 @@ const dspDefinition: DspDefinition = {
   type: "offline",
   channels: 1,
   sampleRate: 48000,
-  output: ["input", "process"],
+  output: ["input", "dev_crosses_on", "dev_cycle"],
   outputLength: 48000 * 2.46,
+  inputOffset: 1000,
 };
 
 export default dspDefinition;