From 5dcd16c270dbc72ee2d58f21a782da990f2a9b34 Mon Sep 17 00:00:00 2001 From: Claude Date: Tue, 31 Mar 2026 01:14:09 +0000 Subject: [PATCH] Rewrite O Fortuna in conductor-style matching Beethoven's 5th approach MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Following the uploaded lead sheet, rewrote O Fortuna with: - Continuous harmonic bed (sustained string chords throughout) - tutti() and choir4() helpers for full orchestral/SATB choir hits - Running string arpeggios as background texture (not hittable) - 9 sections following the score structure with tempo changes (ff opening → pp verses → mp building → f marcato → ff climax → fff finale) - Duration expanded from ~35s to ~95s - Only main choral melody accents are hittable (conductor experience) https://claude.ai/code/session_01TFVkxq4PYhkSFGYHEi4uqY --- index.html | 400 +++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 308 insertions(+), 92 deletions(-) diff --git a/index.html b/index.html index 7df72f7..2bb116c 100644 --- a/index.html +++ b/index.html @@ -934,103 +934,319 @@ const CLASSICAL_PIECES=(function(){ })(); // ── O Fortuna (Carmina Burana) ── + // ~90 seconds, conductor style with continuous harmonic bed, SATB choir, tutti hits + // D minor, 3/4 time. Lead-sheet structure with tempo changes throughout. var ofort=(function(){ - var bg=[],mel=[],q=0.6,h=q/2; - function orch(t,freq,dur,v){ - bg.push({t:t,f:freq,d:dur,i:'strings',v:v||0.35}); - bg.push({t:t,f:freq,d:dur,i:'brass',v:(v||0.35)*0.7}); + var bg=[],mel=[],t=0; + + // === HELPERS === + // Full orchestral hit (strings + brass + bass) + function tutti(time,freq,dur,v){ + bg.push({t:time,f:freq,d:dur,i:'strings',v:v}); + bg.push({t:time,f:freq,d:dur,i:'brass',v:v*0.6}); + bg.push({t:time,f:freq*0.75,d:dur,i:'strings',v:v*0.35}); + if(freq>200)bg.push({t:time,f:freq/2,d:dur,i:'bass',v:v*0.5}); } - function choir(t,freq,dur,v){bg.push({t:t,f:freq,d:dur,i:'choir',v:v||0.4});} - function timp(t,v){bg.push({t:t,f:110,d:0.5,i:'timpani',v:v||0.5});} - // Section 1: Opening chant "O Fortuna" - var t=0; - var ch1=[D4,D4,D4,D4,A3,A3,Bb3,Bb3,A3,A3]; - var ch1d=[h,h,h,q,h,q,h,q,h,q*1.5]; - var ch1l=[0,0,0,0,1,1,2,2,1,1]; - ch1.forEach(function(f,i){ - choir(t,f,ch1d[i]*0.9,0.45);orch(t,f,ch1d[i]*0.9,0.25); - if(ch1d[i]>=q)timp(t,0.4); - mel.push({t:t,l:ch1l[i]});t+=ch1d[i]; - }); - // Section 2: Second chant phrase - t+=0.4; - var ch2=[G3,G3,A3,Bb3,A3,G3,A3,A3]; - var ch2d=[h,h,h,h,q,q,h,q*2]; - var ch2l=[3,3,1,2,1,3,1,1]; - ch2.forEach(function(f,i){ - choir(t,f,ch2d[i]*0.9,0.45);orch(t,f,ch2d[i]*0.9,0.25); - if(ch2d[i]>=q)timp(t,0.4); - mel.push({t:t,l:ch2l[i]});t+=ch2d[i]; - }); - // Section 3: Ascending passage - t+=0.4; - var asc=[D4,E4,F4,E4,D4,D4,E4,F4,G4,A4]; - var ascd=[h,h,h,h,q*1.5,h,h,h,h,q*2]; - var ascl=[0,1,2,1,0,0,1,2,3,0]; - asc.forEach(function(f,i){ - choir(t,f,ascd[i]*0.9,0.5);orch(t,f,ascd[i]*0.9,0.35); - bg.push({t:t,f:f/2,d:ascd[i]*0.9,i:'bass',v:0.3}); - if(ascd[i]>=q)timp(t,0.5); - mel.push({t:t,l:ascl[i]});t+=ascd[i]; - }); - // Section 4: Quiet interlude (strings only, mysterious) - t+=0.5; - var qi=[A3,Bb3,A3,G3,F3,G3,A3,Bb3,C4,D4]; - var qid=[q,h,q,h,q,h,h,h,h,q*2]; - var qil=[1,2,1,3,4,3,1,2,0,0]; - qi.forEach(function(f,i){ - bg.push({t:t,f:f,d:qid[i]*0.9,i:'strings',v:0.25}); - bg.push({t:t,f:f/2,d:qid[i]*0.9,i:'bass',v:0.2}); - mel.push({t:t,l:qil[i]});t+=qid[i]; - }); - // Section 5: Dramatic descent - t+=0.4; - var desc=[A4,G4,F4,E4,D4,E4,F4,G4,A4,A4,G4,F4,E4,D4]; - var descd=[h,h,h,h,h,h,h,h,q,h,h,h,h,q*2]; - var descl=[3,2,1,0,4,1,2,3,3,3,2,1,0,4]; - desc.forEach(function(f,i){ - choir(t,f,descd[i]*0.9,0.55);orch(t,f,descd[i]*0.9,0.4); - bg.push({t:t,f:f/2,d:descd[i]*0.9,i:'bass',v:0.35}); - if(i%3===0)timp(t,0.55); - mel.push({t:t,l:descl[i]});t+=descd[i]; - }); - // Section 6: Second ascending at higher intensity - t+=0.4; - var a2=[D4,E4,F4,G4,A4,Bb4,A4,G4,A4,Bb4,C5,D5]; - var a2d=[h,h,h,h,h,h,h,h,h,h,h,q*2]; - var a2l=[0,1,2,3,0,2,0,3,0,2,1,4]; - a2.forEach(function(f,i){ - choir(t,f,a2d[i]*0.9,0.6);orch(t,f,a2d[i]*0.9,0.45); - bg.push({t:t,f:f/2,d:a2d[i]*0.9,i:'bass',v:0.4}); - if(i%2===0)timp(t,0.55); - mel.push({t:t,l:a2l[i]});t+=a2d[i]; - }); - // Section 7: Extended climactic reprise - t+=0.5; - for(var i=0;i<12;i++){ - var f=i<4?D4:i<8?D5:A4; - choir(t,f,q*0.9,0.6);orch(t,f,q*0.9,0.55); - bg.push({t:t,f:NT.D3,d:q*0.9,i:'bass',v:0.4}); - timp(t,0.6);mel.push({t:t,l:i<4?0:i<8?4:i%2===0?0:3});t+=q; + // SATB choir voicing (soprano + alto + tenor) + function choir4(time,sop,alt,ten,dur,v){ + bg.push({t:time,f:sop,d:dur,i:'choir',v:v}); + bg.push({t:time,f:alt,d:dur,i:'choir',v:v*0.85}); + bg.push({t:time,f:ten,d:dur,i:'choir',v:v*0.7}); } - // Section 8: Final massive chord sequence - t+=0.3; + // Simple choir unison/octave + function choir1(time,freq,dur,v){ + bg.push({t:time,f:freq,d:dur,i:'choir',v:v}); + bg.push({t:time,f:freq/2,d:dur*0.9,i:'choir',v:v*0.5}); + } + // Timpani hit + function timp(time,v){bg.push({t:time,f:D3,d:0.5,i:'timpani',v:v||0.5});} + + // === CONTINUOUS HARMONIC BED (sustained string chords throughout) === + var harmony=[ + [0,6,[D4,F4,A4],0.18], // Dm - opening ff + [6,18,[D4,F4,A4],0.1], // Dm - pp soft verse + [18,30,[D4,F4,A4],0.1], // Dm - pp continued + [30,42,[G3,Bb3,D4],0.14], // Gm - building mp + [42,54,[D4,F4,A4],0.18], // Dm - dramatic + [54,64,[A3,D4,F4],0.2], // Dm inv - forte return + [64,76,[D4,F4,A4],0.25], // Dm - ff marcato + [76,88,[D4,F4,A4],0.3], // Dm - fff climax + [88,95,[D4,F4,A4],0.25] // Dm - finale + ]; + harmony.forEach(function(h){ + for(var ht=h[0];ht0.15)bg.push({t:ht,f:h[2][1],d:1.7,i:'woodwind',v:h[3]*0.4}); + } + }); + + // === SECTION 1 (0-6s): "O Fortuna" — ff, half=60, bold opening === + // 3/4 time, half note = 60 → quarter = 0.5s + var q1=0.5; + // "O For-tu-na, ve-lut Lu-na, sta-tu va-ri-a-bi-lis" + // Big unison D, then choral declamation + var s1notes=[D4,D4,D4,D4, A3,A3,Bb3,Bb3, A3,A3,G3,A3]; + var s1durs= [q1,q1,q1,q1*2, q1,q1*2,q1,q1*2, q1,q1,q1,q1*2]; + var s1lanes=[0,0,0,0, 1,1,2,2, 1,1,3,1]; + t=0; + s1notes.forEach(function(f,i){ + choir4(t,f,f>A3?D4:f,f>C4?A3:f*0.75,s1durs[i]*0.9,0.55); + tutti(t,f,s1durs[i]*0.85,0.5); + if(s1durs[i]>=q1*2)timp(t,0.55); + mel.push({t:t,l:s1lanes[i]}); + t+=s1durs[i]; + }); + + // === SECTION 2 (6-18s): "semper crescis aut decrescis" — pp, half=132, soft pairs === + // half=132 → quarter = ~0.227s + var q2=0.227; + t=6.5; + // Running strings background texture (not hittable) + for(var ri=0;ri<50;ri++){ + var rf=[D4,F4,A4,F4,D4,E4,F4,G4,A4,G4,F4,E4,D4,C4,Bb3,A3][ri%16]; + bg.push({t:t+ri*q2,f:rf,d:q2*0.8,i:'strings',v:0.12}); + } + // Soft choral pairs — only accents are hittable + // "sem-per cres-cis aut de-cres-cis" + var s2notes=[D4,E4, F4,E4, D4,C4, D4,D4]; + var s2durs= [q2*2,q2*2, q2*2,q2*2, q2*2,q2*2, q2*2,q2*4]; + var s2lanes=[0,1, 2,1, 0,3, 0,0]; + s2notes.forEach(function(f,i){ + choir1(t,f,s2durs[i]*0.9,0.3); + bg.push({t:t,f:f,d:s2durs[i]*0.85,i:'woodwind',v:0.18}); + mel.push({t:t,l:s2lanes[i]}); + t+=s2durs[i]; + }); + // "vi-ta de-tes-ta-bi-lis" + t+=q2; + var s2b=[A3,Bb3,A3,G3,A3,Bb3,C4,D4]; + var s2bd=[q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*4]; + var s2bl=[1,2,1,3,1,2,0,0]; + s2b.forEach(function(f,i){ + choir1(t,f,s2bd[i]*0.9,0.3); + bg.push({t:t,f:f,d:s2bd[i]*0.85,i:'woodwind',v:0.18}); + mel.push({t:t,l:s2bl[i]}); + t+=s2bd[i]; + }); + + // === SECTION 3 (18-30s): "nunc obdurat et tunc curat" — pp, same tempo === + t=18.5; + // Running string texture + for(var ri2=0;ri2<52;ri2++){ + var rf2=[A3,C4,D4,F4,E4,D4,C4,Bb3,A3,G3,A3,Bb3,C4,D4,E4,F4][ri2%16]; + bg.push({t:t+ri2*q2,f:rf2,d:q2*0.8,i:'strings',v:0.13}); + } + // "nunc ob-du-rat et tunc cu-rat" + var s3a=[D4,D4,E4,F4,E4,D4,C4,D4]; + var s3ad=[q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*4]; + var s3al=[0,0,1,2,1,0,3,0]; + s3a.forEach(function(f,i){ + choir1(t,f,s3ad[i]*0.9,0.32); + bg.push({t:t,f:f,d:s3ad[i]*0.85,i:'woodwind',v:0.2}); + mel.push({t:t,l:s3al[i]}); + t+=s3ad[i]; + }); + // "lu-do men-tis a-ci-em" + t+=q2; + var s3b=[A3,Bb3,C4,Bb3,A3,G3,A3]; + var s3bd=[q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*4]; + var s3bl=[1,2,0,2,1,3,1]; + s3b.forEach(function(f,i){ + choir1(t,f,s3bd[i]*0.9,0.32); + mel.push({t:t,l:s3bl[i]}); + t+=s3bd[i]; + }); + + // === SECTION 4 (30-42s): "egestatem potestatem" — building mp === + t=30.5; + // Strings now more active + for(var ri3=0;ri3<52;ri3++){ + var rf3=[D4,F4,A4,D5,A4,F4,D4,F4,G4,Bb4,G4,F4,E4,D4,C4,Bb3][ri3%16]; + bg.push({t:t+ri3*q2,f:rf3,d:q2*0.8,i:'strings',v:0.18}); + } + // "e-ges-ta-tem po-tes-ta-tem" + var s4a=[D4,E4,F4,G4,A4,G4,F4,E4]; + var s4ad=[q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*4]; + var s4al=[0,1,2,3,0,3,2,1]; + s4a.forEach(function(f,i){ + choir4(t,f,f>D4?D4:f,f>C4?A3:f*0.75,s4ad[i]*0.9,0.4); + bg.push({t:t,f:f,d:s4ad[i]*0.85,i:'brass',v:0.15}); + if(i%4===0)timp(t,0.35); + mel.push({t:t,l:s4al[i]}); + t+=s4ad[i]; + }); + // "dis-sol-vit ut gla-ci-em" + t+=q2; + var s4b=[F4,E4,D4,C4,D4,E4,D4]; + var s4bd=[q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*4]; + var s4bl=[2,1,0,3,0,1,0]; + s4b.forEach(function(f,i){ + choir4(t,f,D4,A3,s4bd[i]*0.9,0.42); + bg.push({t:t,f:f/2,d:s4bd[i]*0.85,i:'bass',v:0.25}); + if(s4bd[i]>=q2*4)timp(t,0.4); + mel.push({t:t,l:s4bl[i]}); + t+=s4bd[i]; + }); + + // === SECTION 5 (42-54s): "Sors immanis et inanis" — dramatic === + t=42.5; + // Running strings more intense + for(var ri4=0;ri4<52;ri4++){ + var rf4=[D4,A4,F4,D4,G4,Bb4,G4,D4,A4,D5,A4,F4,E4,D4,C4,D4][ri4%16]; + bg.push({t:t+ri4*q2,f:rf4,d:q2*0.8,i:'strings',v:0.22}); + } + // "Sors im-ma-nis et in-a-nis" + var s5a=[A4,A4,G4,F4,E4,F4,G4,A4]; + var s5ad=[q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*4]; + var s5al=[0,0,3,2,1,2,3,0]; + s5a.forEach(function(f,i){ + choir4(t,f,D4,A3,s5ad[i]*0.9,0.5); + tutti(t,f,s5ad[i]*0.85,0.3); + if(i%2===0)timp(t,0.45); + mel.push({t:t,l:s5al[i]}); + t+=s5ad[i]; + }); + // "ro-ta tu vo-lu-bi-lis" + t+=q2; + var s5b=[D5,C5,Bb4,A4,G4,F4,E4,D4]; + var s5bd=[q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*4]; + var s5bl=[4,0,2,1,3,2,1,0]; + s5b.forEach(function(f,i){ + choir4(t,f,F4,D4,s5bd[i]*0.9,0.52); + tutti(t,f,s5bd[i]*0.85,0.32); + if(i===0||i===4)timp(t,0.5); + mel.push({t:t,l:s5bl[i]}); + t+=s5bd[i]; + }); + + // === SECTION 6 (54-64s): More verses — "status malus" continuing pattern === + t=54.5; + for(var ri5=0;ri5<44;ri5++){ + var rf5=[D4,F4,A4,D5,C5,Bb4,A4,G4,F4,E4,D4,C4,Bb3,A3,C4,D4][ri5%16]; + bg.push({t:t+ri5*q2,f:rf5,d:q2*0.8,i:'strings',v:0.2}); + } + // Rising phrase "ve-rum est quod le-gi-tur" + var s6a=[D4,F4,A4,Bb4,A4,G4,F4,G4,A4,Bb4,C5,D5]; + var s6ad=[q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*2,q2*4]; + var s6al=[0,2,0,2,1,3,2,3,1,2,0,4]; + s6a.forEach(function(f,i){ + choir4(t,f,f>D4?D4:f,A3,s6ad[i]*0.9,0.48); + bg.push({t:t,f:f,d:s6ad[i]*0.85,i:'brass',v:0.22}); + bg.push({t:t,f:f/2,d:s6ad[i]*0.85,i:'bass',v:0.3}); + if(i%3===0)timp(t,0.42); + mel.push({t:t,l:s6al[i]}); + t+=s6ad[i]; + }); + + // === SECTION 7 (64-76s): "Sors salutis et virtutis" — f, half=144, marcato === + // half=144 → quarter = ~0.208s + var q3=0.208; + t=64.5; + // Driving string ostinato + for(var ri6=0;ri6<56;ri6++){ + var rf6=[D4,A4,D4,A4,F4,A4,F4,A4][ri6%8]; + bg.push({t:t+ri6*q3,f:rf6,d:q3*0.75,i:'strings',v:0.25}); + } + // Marcato choral accents + // "Sors sa-lu-tis et vir-tu-tis mi-chi nunc con-tra-ri-a" + var s7a=[D4,D4,E4,F4, E4,D4,C4,D4, A4,G4,F4,E4, D4,E4,F4,D4]; + var s7ad=[q3*2,q3*2,q3*2,q3*2, q3*2,q3*2,q3*2,q3*4, q3*2,q3*2,q3*2,q3*2, q3*2,q3*2,q3*2,q3*4]; + var s7al=[0,0,1,2, 1,0,3,0, 0,3,2,1, 0,1,2,4]; + s7a.forEach(function(f,i){ + choir4(t,f,f>D4?D4:f,f>C4?A3:D3,s7ad[i]*0.85,0.55); + tutti(t,f,s7ad[i]*0.8,0.45); + if(i%4===0)timp(t,0.5); + mel.push({t:t,l:s7al[i]}); + t+=s7ad[i]; + }); + // "est af-fec-tus et de-fec-tus" + t+=q3; + var s7b=[A4,Bb4,A4,G4,F4,G4,A4,D4]; + var s7bd=[q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*4]; + var s7bl=[0,2,1,3,2,3,1,4]; + s7b.forEach(function(f,i){ + choir4(t,f,D4,A3,s7bd[i]*0.85,0.58); + tutti(t,f,s7bd[i]*0.8,0.48); + if(i%2===0)timp(t,0.52); + mel.push({t:t,l:s7bl[i]}); + t+=s7bd[i]; + }); + + // === SECTION 8 (76-88s): "Hac in hora sine mora" — ff, climax === + // "corde pulsum tangite; quod per sortem sternit fortem mecum omnes plangite!" + t=76.5; + // Furious string tremolo + for(var ri7=0;ri7<60;ri7++){ + var rf7=[D4,F4,A4,D5,A4,F4,D4,F4,A4,D5,F5,D5,A4,F4,D4,A3][ri7%16]; + bg.push({t:t+ri7*q3,f:rf7,d:q3*0.7,i:'strings',v:0.3}); + if(ri7%4===0)bg.push({t:t+ri7*q3,f:rf7*0.5,d:q3*2,i:'bass',v:0.25}); + } + // "Hac in ho-ra si-ne mo-ra cor-de pul-sum tan-gi-te" + var s8a=[D5,D5,C5,Bb4,A4,G4,A4,Bb4,A4,G4,F4,E4,D4]; + var s8ad=[q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*4]; + var s8al=[4,4,0,2,1,3,1,2,1,3,2,1,0]; + s8a.forEach(function(f,i){ + choir4(t,f,f>D4?F4:f,f>C4?D4:A3,s8ad[i]*0.85,0.65); + tutti(t,f,s8ad[i]*0.8,0.55); + timp(t,0.55); + mel.push({t:t,l:s8al[i]}); + t+=s8ad[i]; + }); + // "quod per sor-tem ster-nit for-tem" + t+=q3; + var s8b=[A4,Bb4,C5,D5,C5,Bb4,A4,G4]; + var s8bd=[q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*2,q3*4]; + var s8bl=[1,2,0,4,0,2,1,3]; + s8b.forEach(function(f,i){ + choir4(t,f,D4,A3,s8bd[i]*0.85,0.68); + tutti(t,f,s8bd[i]*0.8,0.58); + timp(t,0.58); + mel.push({t:t,l:s8bl[i]}); + t+=s8bd[i]; + }); + // "me-cum om-nes plan-gi-te!" + t+=q3; + var s8c=[A4,A4,Bb4,A4,D5,D5,D4]; + var s8cd=[q3*2,q3*2,q3*2,q3*2,q3*3,q3*3,q3*6]; + var s8cl=[0,1,2,1,4,4,0]; + s8c.forEach(function(f,i){ + choir4(t,f,f>D4?F4:f,f>C4?D4:A3,s8cd[i]*0.85,0.72); + tutti(t,f,s8cd[i]*0.8,0.62); + timp(t,0.62); + mel.push({t:t,l:s8cl[i]}); + t+=s8cd[i]; + }); + + // === SECTION 9 (88-95s): Final sustained chords — fff, half=160 === + t=88.5; + // Massive repeated D minor chords + var finQ=0.4; + for(var fc=0;fc<8;fc++){ + var ft=t+fc*finQ; + [D4,F4,A4,D5].forEach(function(f){ + bg.push({t:ft,f:f,d:finQ*0.85,i:'choir',v:0.7}); + bg.push({t:ft,f:f,d:finQ*0.85,i:'brass',v:0.6}); + bg.push({t:ft,f:f,d:finQ*0.85,i:'strings',v:0.55}); + }); + bg.push({t:ft,f:D3,d:finQ*0.85,i:'bass',v:0.55}); + timp(ft,0.65); + mel.push({t:ft,l:4}); + } + // Final sustained Dm chord + t=t+8*finQ+0.3; [D4,F4,A4,D5].forEach(function(f){ - bg.push({t:t,f:f,d:1.5,i:'choir',v:0.55}); - bg.push({t:t,f:f,d:1.5,i:'strings',v:0.5}); - bg.push({t:t,f:f,d:1.5,i:'brass',v:0.45}); + bg.push({t:t,f:f,d:4.0,i:'choir',v:0.65}); + bg.push({t:t,f:f,d:4.0,i:'brass',v:0.55}); + bg.push({t:t,f:f,d:4.0,i:'strings',v:0.5}); }); - bg.push({t:t,f:NT.D3,d:1.5,i:'bass',v:0.5}); - timp(t,0.65);mel.push({t:t,l:4}); - t+=2.0; - // Final D unison - [D4,D5].forEach(function(f){ - bg.push({t:t,f:f,d:2.0,i:'choir',v:0.5}); - bg.push({t:t,f:f,d:2.0,i:'brass',v:0.5}); - }); - bg.push({t:t,f:NT.D3,d:2.0,i:'bass',v:0.55}); - timp(t,0.7);mel.push({t:t,l:4}); - return {n:"O Fortuna",composer:"Orff",bpm:120,duration:Math.ceil(t+2.5),isClassical:true,bg:bg,melody:mel}; + bg.push({t:t,f:D3,d:3.5,i:'bass',v:0.55}); + bg.push({t:t,f:D3,d:3.0,i:'timpani',v:0.6}); + mel.push({t:t,l:4}); + + return {n:"O Fortuna",composer:"Orff",bpm:120,duration:Math.ceil(t+4.5),isClassical:true,bg:bg,melody:mel}; })(); // Theme-variation helper: repeats a theme across passes with growing intensity