diff --git a/dev/public/audio/cycfi-q-pitch-test/1a-Low-E.wav b/dev/public/audio/cycfi-q-pitch-test/1a-Low-E.wav
new file mode 100644
index 0000000..c644815
Binary files /dev/null and b/dev/public/audio/cycfi-q-pitch-test/1a-Low-E.wav differ
diff --git a/dev/public/audio/cycfi-q-pitch-test/2c-A-24th.wav b/dev/public/audio/cycfi-q-pitch-test/2c-A-24th.wav
new file mode 100644
index 0000000..912c33c
Binary files /dev/null and b/dev/public/audio/cycfi-q-pitch-test/2c-A-24th.wav differ
diff --git a/dev/public/audio/cycfi-q-pitch-test/GStaccato.wav b/dev/public/audio/cycfi-q-pitch-test/GStaccato.wav
new file mode 100644
index 0000000..05213cf
Binary files /dev/null and b/dev/public/audio/cycfi-q-pitch-test/GStaccato.wav differ
diff --git a/dev/src/dsp-definitions/27-pitchtracker-2.ts b/dev/src/dsp-definitions/27-pitchtracker-2.ts
index 248abbf..f120e7e 100644
--- a/dev/src/dsp-definitions/27-pitchtracker-2.ts
+++ b/dev/src/dsp-definitions/27-pitchtracker-2.ts
@@ -35,8 +35,8 @@ const dspDefinition: DspDefinition = {
   type: "offline",
   output: ["input", "pitch", "pitch_clean", "osc"],
   inputFile: "/audio/cycfi-q-pitch-test/Hammer-Pull High E.wav",
-  // inputOffset: 30400,
-  outputLength: 88200,
+  inputOffset: 26000,
+  outputLength: 26000,
   sampleRate: 48000,
   channels: 1,
 };
diff --git a/dev/src/dsp-definitions/29-autocorrelation-2.ts b/dev/src/dsp-definitions/29-autocorrelation-2.ts
new file mode 100644
index 0000000..ab47d72
--- /dev/null
+++ b/dev/src/dsp-definitions/29-autocorrelation-2.ts
@@ -0,0 +1,106 @@
+import type { DspDefinition } from "../types";
+
+const dsp = `
+import("stdfaust.lib");
+
+// settings
+
+longest_detectable_period = ma.SR / 80.0;
+shortest_detectable_period = ma.SR / 1318.0;
+
+sample_points = 64 * 2;
+sample_stride = 4;
+
+// utils
+
+changed(x) = x != x';
+only_changed(x) = ba.if(changed(x), x, -1);
+count_stride(total, stride, trig) = ba.countup((total - 1) * stride, trig) / stride : int;
+
+min_since(trig, x) = return
+with {
+  loop(fb, x) = ba.if(trig, x, min(x, fb));
+  return = x : loop ~ _;
+};
+
+mean_since(trig, x) = return
+with {
+  count = ba.countup(9999, trig);
+  loop(fb, x) = (fb * (trig == 0)) + x;
+  return = x : loop ~ _ : /(count + 1);
+};
+
+// process
+
+input = _;
+envelope = an.amp_follower_ar(0.0,0.1);
+start_capture = envelope : >(0.1) : ba.impulsify : @(longest_detectable_period);
+
+samples_since_start_capture = ba.countup(99999, start_capture);
+samples_since_capture_end = samples_since_start_capture - (sample_points - 1) * sample_stride;
+start_detect_pitch = samples_since_capture_end >= shortest_detectable_period : ba.impulsify;
+trigger_sample_capture = start_capture : count_stride(sample_points, sample_stride) : only_changed;
+
+each(i,curr_v) = result
+with {
+  samples_ago = (sample_points - i - 1) * sample_stride;
+  offset_v = curr_v : @(samples_ago);
+  captured_v = ba.sAndH(trigger_sample_capture(offset_v) == i);
+  diff_v = curr_v - captured_v;
+  result = diff_v * diff_v;
+};
+
+autocorrelated_difference = _ <: par(i, sample_points, each(i)) :> _;
+
+culumative_mean_difference(v) = result
+with {
+  acd = v : autocorrelated_difference;
+  mean_since_start_capture = acd : mean_since(v : start_detect_pitch);
+  result = acd : /(mean_since_start_capture) : min(20.0);
+};
+
+cmd = culumative_mean_difference;
+
+best_match_foo(v) = result
+with {
+  min_since_start_capture = v : culumative_mean_difference : min_since(v : start_detect_pitch);
+  min_changed = min_since_start_capture : changed;
+  period = v : samples_since_capture_end : ba.sAndH(min_changed);
+  result = (ma.SR / (period + 0.001)) : max(20.0) : min(20000.0);
+};
+
+best_match = best_match_foo;
+osc = best_match : os.osc * 0.4;
+`;
+
+const dspDefinition: DspDefinition = {
+  id: "autocorrelation-2",
+  name: "Auto-correlation 2",
+  description: "Auto-correlates pitch 2",
+  dsp,
+  type: "offline",
+  output: [
+    "input",
+    "trigger_sample_capture",
+    "samples_since_capture_end",
+    "autocorrelated_difference",
+    "cmd",
+    "best_match",
+    "osc",
+  ],
+  inputFile: "/audio/cycfi-q-pitch-test/GStaccato.wav",
+  inputOffset: 25400,
+  outputLength: 192000, // 27921, // 192000,
+
+  // inputFile: "/audio/cycfi-q-pitch-test/2c-A-24th.wav",
+  // inputOffset: 7624,
+  // outputLength: 20000, // 27921, // 192000,
+
+  // inputFile: "/audio/cycfi-q-pitch-test/1a-Low-E.wav",
+  // inputOffset: 47500,
+  // outputLength: 55000, // 27921, // 192000,
+  sampleRate: 48000,
+  channels: 1,
+};
+
+export default dspDefinition;
diff --git a/dev/src/dsp-definitions/32-min-since.ts b/dev/src/dsp-definitions/32-min-since.ts
new file mode 100644
index 0000000..1380ff7
--- /dev/null
+++ b/dev/src/dsp-definitions/32-min-since.ts
@@ -0,0 +1,36 @@
+import type { DspDefinition } from "../types";
+
+const dsp = `
+import("stdfaust.lib");
+
+min_since(trig, x) = return
+with {
+  loop(fb, x) = ba.if(trig, x, min(x, fb));
+  return = x : loop ~ _;
+};
+
+process = min_since;
+`;
+
+const dspDefinition: DspDefinition = {
+  id: "min-since",
+  name: "Min since",
+  description: "Min since",
+  dsp,
+  type: "offline",
+  input: [
+    [1, 0, 0, 0, 1, 0, 0, 0],
+    [4, 3, 2, 3, 9, 3, 4, 5],
+  ],
+  output: ["process"],
+  expect: {
+    process: [
+      [4, 3, 2, 2, 9, 3, 3, 3],
+      [4, 3, 2, 2, 9, 3, 3, 3],
+    ],
+  },
+  channels: 2,
+  sampleRate: 44100,
+};
+
+export default dspDefinition;
diff --git a/dev/src/dsp-definitions/33-pitchtracker-3.ts b/dev/src/dsp-definitions/33-pitchtracker-3.ts
new file mode 100644
index 0000000..77465b7
--- /dev/null
+++ b/dev/src/dsp-definitions/33-pitchtracker-3.ts
@@ -0,0 +1,70 @@
+import type { DspDefinition } from "../types";
+
+const dsp = `
+import("stdfaust.lib");
+
+// settings
+
+// utils
+
+reduce_while(reducer, trig, x) = x : loop ~ _
+with {
+  loop(prev, next) = ba.if(trig, next, reducer(prev, next));
+};
+
+max_while = reduce_while(max);
+
+// process
+
+input = _;
+envelope = an.amp_follower_ar(0.0,0.1);
+start_note = envelope : >(0.1) : ba.impulsify;
+
+amplitude = an.amp_follower_ar(0.0,0.01) : max(0.05);
+compress(x) = x / amplitude(x) * 10;
+
+prep = fi.dcblockerat(40.0) : max(0.0);
+
+zippy = prep : compress;
+tick = prep : compress : >=(9) : ba.impulsify;
+tick_rise = tick : ba.countup(9999);
+
+
+
+// tick = prep : zippy : >(0.5) : ==(0) : ba.countup(9999); // can get too swamped with similar sized spikes
+// osc = best_match : os.osc * 0.4;
+`;
+
+const dspDefinition: DspDefinition = {
+  id: "pitchtracker-3",
+  name: "Pitch tracker 3",
+  description: "Tracks pitch 3",
+  dsp,
+  type: "offline",
+  output: ["input", "tick", "tick_rise", "start_note", "amplitude", "zippy"],
+
+  // inputFile: "/audio/cycfi-q-pitch-test/GStaccato.wav",
+  // inputOffset: 25400,
+  // outputLength: 192000,
+
+  // inputFile: "/audio/cycfi-q-pitch-test/2c-A-24th.wav",
+  // inputOffset: 7624,
+  // outputLength: 20000, // 27921, // 192000,
+
+  inputFile: "/audio/cycfi-q-pitch-test/1a-Low-E.wav",
+  inputOffset: 47500,
+  outputLength: 55000, // 27921, // 192000,
+
+  // inputFile: "/audio/cycfi-q-pitch-test/Tapping D.wav",
+  // inputOffset: 30400,
+  // outputLength: 88200,
+
+  // inputFile: "/audio/cycfi-q-pitch-test/Hammer-Pull High E.wav",
+  // inputOffset: 26000,
+  // outputLength: 40000,
+
+  sampleRate: 48000,
+  channels: 1,
+};
+
+export default dspDefinition;
diff --git a/dev/src/dsp-definitions/all.ts b/dev/src/dsp-definitions/all.ts
index 006ab6f..280138f 100644
--- a/dev/src/dsp-definitions/all.ts
+++ b/dev/src/dsp-definitions/all.ts
@@ -28,8 +28,11 @@ import autocorrelation from "./25-autocorrelation";
 import envelopeDetector from "./26-envelope-detector";
 import pitchtracker2 from "./27-pitchtracker-2";
 import averageSince from "./28-average-since";
+import autocorrelation2 from "./29-autocorrelation-2";
 import echoloop from "./30-echoloop";
 import echoloopLive from "./31-echoloop-live";
+import minSince from "./32-min-since";
+import pitchtracker3 from "./33-pitchtracker-3";
 
 export const all: DspDefinition[] = [
   sineWave,
@@ -60,6 +63,9 @@ export const all: DspDefinition[] = [
   envelopeDetector,
   pitchtracker2,
   averageSince,
+  autocorrelation2,
   echoloop,
   echoloopLive,
+  minSince,
+  pitchtracker3,
 ];
diff --git a/dev/src/offline-visualisations.tsx b/dev/src/offline-visualisations.tsx
index 92089f2..9b33041 100644
--- a/dev/src/offline-visualisations.tsx
+++ b/dev/src/offline-visualisations.tsx
@@ -177,7 +177,9 @@ export function Plot(props: PlotProps) {
     startDragPan.current = pan;
   };
 
-  const handleWheel = (e: React.WheelEvent<HTMLCanvasElement>) => {
+  const handleWheel = (e) => {
+    e.stopPropagation();
+    e.preventDefault();
     const { pixelY } = normalizeWheel(e);
     const dir = pixelY < 0 ? 2 : 0.5;
     setPlotState(([p, z, h]) => {
@@ -208,6 +210,8 @@ export function Plot(props: PlotProps) {
     const canvas = canvasRef.current;
     const drawContext = canvas?.getContext("2d");
 
+    canvas?.addEventListener("wheel", handleWheel);
+
     if (drawContext) {
       drawContext.clearRect(0, 0, width, height);
       const max = width / zoomWidth;
@@ -227,7 +231,19 @@ export function Plot(props: PlotProps) {
         drawContext.fillRect(px, Math.round(y), pw, 1);
       }
     }
-  }, [output, width, height, highlight, pan, zoomWidth, zoomHeight]);
+    return () => {
+      canvas?.removeEventListener("wheel", handleWheel);
+    };
+  }, [
+    output,
+    width,
+    height,
+    highlight,
+    pan,
+    zoomWidth,
+    zoomHeight,
+    handleWheel,
+  ]);
 
   return (
     <canvas
@@ -237,7 +253,6 @@ export function Plot(props: PlotProps) {
       onPointerDown={handlePointerDown}
       onPointerMove={handlePointerMove}
       onPointerOut={handlePointerOut}
-      onWheel={handleWheel}
     />
   );
 }