From 1aab788c24273d7b16bca8a588d6678ab43f436f Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Tue, 31 Mar 2026 03:38:01 +0000
Subject: [PATCH] Add Nursery Rhymes & Ragtime genres, add Simple/Full note
 density toggle
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

New genres:
- Nursery Rhymes (10 songs): Baa Baa Black Sheep, London Bridge,
  Old MacDonald, Row Row Row Your Boat, Three Blind Mice,
  Itsy Bitsy Spider, Pop Goes the Weasel, Hot Cross Buns,
  Jack and Jill, Humpty Dumpty — all at slow tempos (65-85 BPM)
- Ragtime (8 songs): The Entertainer, Maple Leaf Rag,
  The Easy Winners, Elite Syncopations, Solace, Peacherine Rag,
  The Cascades, Pineapple Rag — all Scott Joplin (public domain)

Simple/Full mode:
- Toggle in Active Pads card switches between Full and Simple density
- Simple mode enforces 350ms minimum gap between notes, removing
  rapid passages while keeping the melody recognizable
- Works on both synth genres (classical/folk/etc) and rhythm patterns
- Lightweight: just a filter on the note array, no piece data changes

https://claude.ai/code/session_016nhMjrAqwWXKKgBm6EQuX1
---
 index.html | 207 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 204 insertions(+), 3 deletions(-)

diff --git a/index.html b/index.html
index 8619f58..e9e175f 100644
--- a/index.html
+++ b/index.html
@@ -98,6 +98,12 @@ canvas{display:block;}
     <h2>Active Pads</h2>
     <div class="pad-toggle" id="pad-toggles"></div>
     <p style="font-size:11px;opacity:.4;margin-top:8px">Toggle which pads show notes. Inactive pads still make sound when hit.</p>
+    <div style="margin-top:10px;padding-top:8px;border-top:1px solid #222;">
+      <span style="font-size:11px;opacity:.5;margin-right:8px;">Note density:</span>
+      <button class="smbtn" id="density-full" onclick="setSimpleMode(false)">Full</button>
+      <button class="smbtn" id="density-simple" onclick="setSimpleMode(true)">Simple</button>
+      <span style="font-size:10px;opacity:.35;margin-left:6px;" id="density-hint">Fewer notes for beginners</span>
+    </div>
     <div id="hitmode-toggle" style="display:none;margin-top:10px;padding-top:8px;border-top:1px solid #222;">
       <span style="font-size:11px;opacity:.5;margin-right:8px;">Classical hit sound:</span>
       <button class="smbtn" id="hitmode-drums" onclick="setHitMode('drums')">🥁 Drums</button>
@@ -191,6 +197,8 @@ const LANES=[
 
 // which pads are active (show notes) — all on by default
 let activePads=[true,true,true,true,true];
+// Simple mode — thins out notes, keeping only strong beats
+let simpleMode=false;
 
 // ── RHYTHMS ───────────────────────────────────────────
 // Every pattern now uses ALL 5 lanes (0=Red/tom, 1=Yellow/snare, 2=Blue/hihat, 3=Green/tom2, 4=Kick)
@@ -4059,10 +4067,194 @@ const WORLD_PIECES=(function(){
   return [hava,cucaracha,frere,cielito,waltzing,osole,ballgame,mountain];
 })();
 
-var SYNTH_GENRES={"Prime":PRIME_PIECES,"Singalong":SINGALONG_PIECES,"Christmas":CHRISTMAS_PIECES,"Folk":FOLK_PIECES,"Spirituals":SPIRITUAL_PIECES,"World":WORLD_PIECES,"Classical":CLASSICAL_PIECES,"Video Games":VIDEOGAME_PIECES,"Chiptune Originals":CHIPTUNE_PIECES};
+// ── NURSERY RHYMES (very simple, beginner-friendly) ──
+const NURSERY_PIECES=(function(){
+  var C4=NT.C4,D4=NT.D4,E4=NT.E4,F4=NT.F4,G4=NT.G4,A4=NT.A4,B4=NT.B4,
+    C5=NT.C5,D5=NT.D5,E5=NT.E5,G3=NT.G3,A3=NT.A3,B3=NT.B3;
+  function rhyme(name,origin,bpm,theme,lanes,durations,passes,root){
+    var bg=[],mel=[],t=0,q=0.3;
+    for(var rep=0;rep<passes;rep++){
+      var v=0.25+rep*0.08;
+      var inst=rep<1?'woodwind':'strings';
+      theme.forEach(function(f,i){
+        var d=(durations?durations[i]:1)*q;
+        bg.push({t:t,f:f,d:d*0.85,i:inst,v:v});
+        if(rep>0)bg.push({t:t,f:f/2,d:d*0.85,i:'bass',v:v*0.25});
+        mel.push({t:t,l:lanes[i]});t+=d;
+      });
+      t+=0.5;
+    }
+    var r=root||theme[0];
+    [r,r*5/4,r*3/2,r*2].forEach(function(f){bg.push({t:t,f:f,d:2.0,i:'strings',v:0.4});});
+    mel.push({t:t,l:4});
+    return {n:name,composer:origin,bpm:bpm,duration:Math.ceil(t+2.5),isClassical:true,bg:bg,melody:mel};
+  }
+  // ── Baa Baa Black Sheep (same melody as Twinkle but different words) ──
+  var baa=rhyme("Baa Baa Black Sheep","English (1731)",70,
+    [C4,C4,G4,G4,A4,A4,G4,F4,F4,E4,E4,D4,D4,C4],
+    [0,0,3,3,0,0,3,1,1,2,2,1,1,0],
+    [1,1,1,1,1,1,3,1,1,1,1,1,1,4],
+    3,C4);
+  // ── London Bridge ──
+  var london=rhyme("London Bridge Is Falling Down","English (1744)",75,
+    [G4,A4,G4,F4,E4,F4,G4,D4,E4,F4,E4,F4,G4,G4,A4,G4,F4,E4,F4,G4,D4,G4,E4,C4],
+    [3,0,3,1,2,1,3,1,2,1,2,1,3,3,0,3,1,2,1,3,1,3,2,0],
+    [1,1,1,1,1,1,2,1,1,2,1,1,2,1,1,1,1,1,1,2,2,1,1,4],
+    3,C4);
+  // ── Old MacDonald ──
+  var macdonald=rhyme("Old MacDonald Had a Farm","English (1706)",80,
+    [C4,C4,C4,G4,A4,A4,G4,E4,E4,D4,D4,C4,G4,C4,C4,C4,G4,A4,A4,G4,E4,E4,D4,D4,C4],
+    [0,0,0,3,0,0,3,2,2,1,1,0,3,0,0,0,3,0,0,3,2,2,1,1,0],
+    [1,1,1,1,1,1,2,1,1,1,1,3,2,1,1,1,1,1,1,2,1,1,1,1,4],
+    3,C4);
+  // ── Row Row Row Your Boat ──
+  var row=rhyme("Row Row Row Your Boat","English (1852)",70,
+    [C4,C4,C4,D4,E4,E4,D4,E4,F4,G4,C5,C5,C5,G4,G4,G4,E4,E4,E4,C4,C4,C4,G4,F4,E4,D4,C4],
+    [0,0,0,1,2,2,1,2,1,3,0,0,0,3,3,3,2,2,2,0,0,0,3,1,2,1,0],
+    [1,1,1,1,2,1,1,1,1,3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,4],
+    3,C4);
+  // ── Three Blind Mice ──
+  var mice=rhyme("Three Blind Mice","English (1609)",75,
+    [E4,D4,C4,E4,D4,C4,G4,F4,E4,G4,F4,E4,G4,A4,G4,F4,E4,D4,G4,A4,G4,F4,E4,D4,C4],
+    [2,1,0,2,1,0,3,1,2,3,1,2,3,0,3,1,2,1,3,0,3,1,2,1,0],
+    [1,1,2,1,1,2,1,1,2,1,1,2,1,1,1,1,1,2,1,1,1,1,1,1,4],
+    3,C4);
+  // ── Itsy Bitsy Spider ──
+  var spider=rhyme("Itsy Bitsy Spider","English (1910s)",75,
+    [G4,C5,C5,C5,D5,E5,E5,D5,C5,D5,E5,C5,E5,E5,D5,D5,C5,G4,C5,C5,C5,D5,E5,E5,D5,C5,D5,E5,C5],
+    [3,0,0,0,1,2,2,1,0,1,2,0,2,2,1,1,0,3,0,0,0,1,2,2,1,0,1,2,0],
+    [1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,1,4],
+    3,C4);
+  // ── Pop Goes the Weasel ──
+  var weasel=rhyme("Pop Goes the Weasel","English (1850s)",85,
+    [C4,E4,E4,F4,G4,G4,C4,E4,E4,D4,F4,A4,A4,G4,C4,E4,E4,F4,G4,G4,E4,C4,D4,F4,E4,C4],
+    [0,2,2,1,3,3,0,2,2,1,1,0,0,3,0,2,2,1,3,3,2,0,1,1,2,0],
+    [1,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,4],
+    3,C4);
+  // ── Hot Cross Buns ──
+  var hotcross=rhyme("Hot Cross Buns","English (1798)",65,
+    [E4,D4,C4,E4,D4,C4,C4,C4,C4,C4,D4,D4,D4,D4,E4,D4,C4],
+    [2,1,0,2,1,0,0,0,0,0,1,1,1,1,2,1,0],
+    [1,1,3,1,1,3,1,1,1,1,1,1,1,1,1,1,4],
+    4,C4);
+  // ── Jack and Jill ──
+  var jack=rhyme("Jack and Jill","English (1765)",80,
+    [C4,C4,D4,E4,E4,F4,G4,G4,F4,E4,F4,G4,A4,A4,G4,F4,E4,D4,C4],
+    [0,0,1,2,2,1,3,3,1,2,1,3,0,0,3,1,2,1,0],
+    [1,1,1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,4],
+    3,C4);
+  // ── Humpty Dumpty ──
+  var humpty=rhyme("Humpty Dumpty","English (1797)",75,
+    [E4,G4,A4,G4,F4,E4,D4,E4,F4,E4,D4,C4,E4,G4,A4,G4,F4,E4,D4,C4],
+    [2,3,0,3,1,2,1,2,1,2,1,0,2,3,0,3,1,2,1,0],
+    [1,1,2,1,1,1,2,1,1,1,1,2,1,1,2,1,1,1,1,4],
+    3,C4);
+  return [baa,london,macdonald,row,mice,spider,weasel,hotcross,jack,humpty];
+})();
 
+// ── RAGTIME (Scott Joplin & contemporaries, all public domain) ──
+const RAGTIME_PIECES=(function(){
+  var C3=NT.C3,D3=NT.D3,E3=NT.E3,F3=NT.F3,G3=NT.G3,A3=NT.A3,Bb3=NT.Bb3,B3=NT.B3,
+    C4=NT.C4,D4=NT.D4,Eb4=NT.Eb4,E4=NT.E4,F4=NT.F4,G4=NT.G4,Ab4=NT.Ab4,A4=NT.A4,Bb4=NT.Bb4,B4=NT.B4,
+    C5=NT.C5,D5=NT.D5,Eb5=NT.Eb5,E5=NT.E5,F5=NT.F5,G5=NT.G5;
+  function rag(name,composer,bpm,theme,lanes,durations,passes,root){
+    var bg=[],mel=[],t=0,q=0.2;
+    for(var rep=0;rep<passes;rep++){
+      var v=0.2+rep*0.08;
+      // Ragtime uses piano-like timbres: strings for right hand, bass for left
+      var inst=rep%2===0?'strings':'woodwind';
+      theme.forEach(function(f,i){
+        var d=(durations?durations[i]:1)*q;
+        bg.push({t:t,f:f,d:d*0.8,i:inst,v:v});
+        // Stride bass pattern: root on beats, fifth on off-beats
+        if(i%4===0)bg.push({t:t,f:(root||theme[0])/2,d:d*0.6,i:'bass',v:v*0.5});
+        if(i%4===2)bg.push({t:t,f:(root||theme[0])*3/4,d:d*0.6,i:'bass',v:v*0.4});
+        mel.push({t:t,l:lanes[i]});t+=d;
+      });
+      t+=0.3;
+    }
+    var r=root||theme[0];
+    [r,r*5/4,r*3/2,r*2].forEach(function(f){bg.push({t:t,f:f,d:2.0,i:'strings',v:0.5});});
+    bg.push({t:t,f:r/2,d:1.5,i:'bass',v:0.5});mel.push({t:t,l:4});
+    return {n:name,composer:composer,bpm:bpm,duration:Math.ceil(t+2.5),isClassical:true,bg:bg,melody:mel};
+  }
+
+  // ── The Entertainer — A section (most famous part) ──
+  var entertainer=rag("The Entertainer","Scott Joplin (1902)",130,
+    [D4,Eb4,E4,C5,E4,C5,E4,C5,C5,D5,Eb5,E5,C5,D5,E5,C5,D5,Eb5,E5,C5,E4,C5,E4,C5,A4,G4,A4,B4,C5],
+    [1,2,2,0,2,0,2,0,0,1,2,2,0,1,2,0,1,2,2,0,2,0,2,0,0,3,0,3,0],
+    [1,1,1,2,1,1,1,2,1,1,1,1,1,1,2,1,1,1,1,2,1,1,1,1,1,1,1,1,4],
+    4,C4);
+
+  // ── Maple Leaf Rag — A section ──
+  var maple=rag("Maple Leaf Rag","Scott Joplin (1899)",140,
+    [Ab4,A4,C5,E5,C5,A4,C5,A4,Ab4,A4,C5,E5,D5,C5,A4,G4,Ab4,A4,C5,E5,C5,A4,C5,A4,G4,A4,G4,E4,C4],
+    [0,0,0,2,0,0,0,0,0,0,0,2,1,0,0,3,0,0,0,2,0,0,0,0,3,0,3,2,0],
+    [1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,1,4],
+    4,A4);
+
+  // ── The Easy Winners — A section ──
+  var easyw=rag("The Easy Winners","Scott Joplin (1901)",125,
+    [G4,B4,D5,B4,A4,G4,E4,G4,A4,B4,C5,D5,E5,D5,C5,B4,A4,G4,B4,D5,B4,A4,G4,E4,D4,E4,G4],
+    [3,3,1,3,0,3,2,3,0,3,0,1,2,1,0,3,0,3,3,1,3,0,3,2,1,2,3],
+    [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,4],
+    4,G4);
+
+  // ── Elite Syncopations — A section ──
+  var elite=rag("Elite Syncopations","Scott Joplin (1902)",130,
+    [E4,G4,A4,B4,C5,D5,E5,D5,C5,B4,A4,G4,E4,G4,A4,B4,C5,E5,D5,C5,B4,A4,G4,E4,D4,C4],
+    [2,3,0,3,0,1,2,1,0,3,0,3,2,3,0,3,0,2,1,0,3,0,3,2,1,0],
+    [1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,4],
+    4,C4);
+
+  // ── Solace — A section (a Mexican serenade, slower ragtime) ──
+  var solace=rag("Solace","Scott Joplin (1909)",95,
+    [A4,G4,A4,C5,B4,A4,G4,E4,D4,E4,G4,A4,B4,A4,G4,E4,A4,G4,A4,C5,D5,C5,B4,A4,G4,E4,D4,C4],
+    [0,3,0,0,3,0,3,2,1,2,3,0,3,0,3,2,0,3,0,0,1,0,3,0,3,2,1,0],
+    [1,1,2,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,2,1,1,1,1,1,1,1,1,4],
+    4,A4);
+
+  // ── Peacherine Rag — A section ──
+  var peacherine=rag("Peacherine Rag","Scott Joplin (1901)",135,
+    [C5,C5,B4,C5,E5,D5,C5,A4,C5,C5,B4,C5,G4,A4,B4,C5,C5,B4,C5,E5,D5,C5,B4,A4,G4],
+    [0,0,3,0,2,1,0,0,0,0,3,0,3,0,3,0,0,3,0,2,1,0,3,0,3],
+    [1,1,1,2,1,1,1,2,1,1,1,2,1,1,1,1,1,1,2,1,1,1,1,1,4],
+    4,C4);
+
+  // ── The Cascades — A section ──
+  var cascades=rag("The Cascades","Scott Joplin (1904)",125,
+    [C5,B4,C5,E5,G5,E5,C5,D5,C5,B4,A4,G4,C5,B4,C5,E5,G5,E5,C5,D5,E5,D5,C5,B4,C5],
+    [0,3,0,2,3,2,0,1,0,3,0,3,0,3,0,2,3,2,0,1,2,1,0,3,0],
+    [1,1,2,1,1,1,1,1,1,1,1,2,1,1,2,1,1,1,1,1,1,1,1,1,4],
+    4,C4);
+
+  // ── Pineapple Rag — A section ──
+  var pineapple=rag("Pineapple Rag","Scott Joplin (1908)",130,
+    [C4,E4,G4,C5,E5,C5,G4,E4,C4,E4,G4,B4,D5,B4,G4,E4,C4,E4,G4,C5,E5,D5,C5,B4,A4,G4,C5],
+    [0,2,3,0,2,0,3,2,0,2,3,3,1,3,3,2,0,2,3,0,2,1,0,3,0,3,0],
+    [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,4],
+    4,C4);
+
+  return [entertainer,maple,easyw,elite,solace,peacherine,cascades,pineapple];
+})();
+
+var SYNTH_GENRES={"Prime":PRIME_PIECES,"Nursery Rhymes":NURSERY_PIECES,"Singalong":SINGALONG_PIECES,"Christmas":CHRISTMAS_PIECES,"Folk":FOLK_PIECES,"Spirituals":SPIRITUAL_PIECES,"World":WORLD_PIECES,"Ragtime":RAGTIME_PIECES,"Classical":CLASSICAL_PIECES,"Video Games":VIDEOGAME_PIECES,"Chiptune Originals":CHIPTUNE_PIECES};
+
+function simplifyNotes(notes){
+  if(!simpleMode||notes.length<2)return notes;
+  // Keep roughly half the notes — enforce a minimum gap between consecutive notes
+  var sorted=notes.slice().sort(function(a,b){return a.time-b.time;});
+  var minGap=0.35/gameSpeed; // ~350ms minimum between notes in simple mode
+  var result=[sorted[0]];
+  for(var i=1;i<sorted.length;i++){
+    if(sorted[i].time-result[result.length-1].time>=minGap){
+      result.push(sorted[i]);
+    }
+  }
+  return result;
+}
 function buildClassicalNotes(piece){
-  return piece.melody.filter(function(m){return activePads[m.l];})
+  var raw=piece.melody.filter(function(m){return activePads[m.l];})
     .map(function(m){
       var freq=261.63;
       for(var i=0;i<piece.bg.length;i++){
@@ -4072,6 +4264,7 @@ function buildClassicalNotes(piece){
       return{time:m.t/gameSpeed,lane:m.l,freq:freq,hit:false,missed:false};
     })
     .sort(function(a,b){return a.time-b.time;});
+  return simplifyNotes(raw);
 }
 
 function beginClassical(){
@@ -4137,6 +4330,13 @@ function buildPadToggles(){
   });
 }
 buildPadToggles();
+function setSimpleMode(on){
+  simpleMode=on;
+  var full=document.getElementById("density-full"),simple=document.getElementById("density-simple");
+  if(full){full.className="smbtn"+(on?"":" purple");}
+  if(simple){simple.className="smbtn"+(on?" purple":"");}
+}
+setSimpleMode(false);
 function saveSettings(){localStorage.setItem("drgameSettings",JSON.stringify({speed:gameSpeed,volume:masterVolume}));}
 function syncSliders(){
   var sv=Math.round(gameSpeed*100),vv=Math.round(masterVolume*100);
@@ -4331,7 +4531,8 @@ function buildNotes(r){
     for(const p of r.p)
       if(activePads[p.l])
         res.push({time:(bar*4+p.t)*bs,lane:p.l,hit:false,missed:false});
-  return res.sort((a,b)=>a.time-b.time);
+  var sorted=res.sort((a,b)=>a.time-b.time);
+  return simplifyNotes(sorted);
 }
 
 function countdown(cb){