lp=(i,w)=>{t?0:d=0;if(w==0)return i;out=i+d;d=out/(1+1/w);return d/w},k=a=>{throw a},(s=((-t&131071)/131072)),r=(x,y=49152,z=0.5)=>(t?0:a=Array(y).fill(0),b=x%256+a.shift(),a.push(b*z),b),Arp=a=>a.slice(0,min(a.length,1+((t>>11)&63))),f=b=>lp(((t*b)&255)/256-.5,8+(t&131071)/1024)*s,
j=c=>((((t*c)&128)/128)-.5)/4,g=(d,l)=>d.map(l).reduce((a,b)=>a+b,0)/d.length,p=[(r(g(Arp(n=([[2,5/2,3,15/4],[4/3,2,3,11/3],[2,9/4,12/5,3,18/5],[2,8/3,32/9],[2,5/2,3,7/2],[8/7,12/7,2,3,24/7],[1,1.5,9/4,27/8],[4/3,5/3,2,8/3,10/3]][t>>17&7])),f),10240,.4)),j(n[n.length-1])],
t&131071?p:k("\n"+["B\\|","B(|)","B||/","B\\||/","B|||)","A|)","A","A\\|"][7&t>>17])

t&3072?2*(((8*t*(t&4096?8:5)*(1+(t>>12&3))>>(2+(t>>10&3))>>(1-(t>>10&3)/3))/(1+(t>>17&1))&255)*(t>>4&192)/128&255)/3+(t*~t>>t)*!(t>>7&15):(8*t>>t/128)+((t*~t>>t&255)*!!(t>>7&5)+(21*t&128)*!(t>>7&5))*!(t>>10&7^4)*(t>>16&1)

bitcrush=1,t=(t/bitcrush|0)*bitcrush,c=(x,y)=>x%256*y,BPM=192,SAMPRATE=38250,T=t*BPM/15/SAMPRATE*4096,er=0/0,I=3,fd=(x,y)=>x%256*(y&2047)/2048,A=32768,H=T=>t*2**(parseInt('077A5573352232053'[(T*(1+(T>>18&1))>>13)%16],36)/12)*(1+(T>>18&1)),B=T=>t*2**(parseInt('0357'[(T>>16)%4],36)/12)/4*(1+(T>>18&1)),bass=T=>c(B(T),abs(((T+262144)/32768%16)-8))/2%256,b=T=>((abs(((c(bass(T)%256,abs(((T+262144)/32768%16)-8))-128)%256)-128)%256))&255,b2=T=>(bass(T)*3^(abs(((c(bass(T)%256,abs(((T+262144)/32768%16)-8))-128)%256)-128)%256))&255,h1=T=>(H(T)*5/2^H(T)/2)&255,h2=T=>((H(T)*1.25^H(T)/16*3*1.25)-H(T)*1.015625+1|H(T))&255,h=T=>(h1(T)%256)/2+(h2(T)%256)/2,kick=T=>sqrt(T/32%256)*256*[1,0,0,0,0,1,0,0,1,1,0,0,0,1,0,0][(T>>13)%16]%256
,A=T=>[er,er,1,1,I,I,1,I,1,I,er,er,I,I,1,I,er,er,er,er,I,I,1,I,1,I,er,er,I,I,1,I][(T>>12)%32],B_=T=>[er,er,er,er,I,I,1,I,1,I,er,er,I,I,1,I][(T>>12)%16],ABsnarehi=T=>fd(t*tan(t>>[A(T),B_(T)][(T>>17)%2])/8&128*([[er,er,1,1,2,2,1,2,1,2,er,er,2,2,1,2,er,er,er,er,2,2,1,2,1,2,er,er,2,2,1,2][(T>>12)%32],[er,er,1,1,2,2,1,2,1,2,er,er,2,2,1,2,er,er,er,er,2,2,1,2,1,2,er,er,2,2,1,2][(T>>12)%32]][(T>

return (t,s)=>(t*=s,t*(42&t>>10)&255)/128-1

return t=>(t*=8E3,t*(42&t>>10)&255)/128-1

return (t,s)=>(t*=s,t*(4|t>>13&3)>>(~t>>11&1)&128|t*(t>>11&t>>13)*(~t>>9&3)&127)/128-1

t/=48E3,s=s=>2**(('023578'[s%7|0]||10)/12+(s/7|0)+7.5),o=(t,b)=>(O=[O=t>12&&sin(b*200)/4+(t*s('0035'[t/3&3])/4%1>t/3%1)/4*b||0,O],(T=>{for(i=0;i<9;i++)(N=t-3/8*i)<0||(n=N*s(N%3*4-(N/3&2)+7),O[i%2]+=N<132&&T(n+N%3/9*T(n/((N/3&3)+1)))*(1-N*4%1)/3*.6**i)})(t=>abs(t%1*4-2)-1),O),t>127?o(t+4):o(t>48?(a=t%1,x=t*2&7,(t/4|0)*3+(t>96?(t&3)+a-(x>3):[a,(t&3)+[a%(1/12),(a-1)**2,a,a-.5,a*3/2,a*2/3,a-1,a-1][x],[a*3/2,a,a*3/2,(a-1)**2,a,a-.5,a*2/3,a*2/4][x]][t/16-3|0])):t,t<24||(t*(t/8-13|0?2:1)%1)**.4)

t?0:d=0,
lp = (inp,w) => { 
	if (w == 0) return inp
	out = inp + d
	d = out / (1+1/w)
	return d / w
},
r=(x,y=12288,z=0.5)=>(t?0:a=Array(y).fill(0),b=x%256+a.shift(),a.push(b*z),b),
Arp=a=>a.slice(0,min(a.length,1+((t>>10)&127))),
f=b=>lp(((t*b)&255)/256-.5,8+(t&131071)/1024)*(s=((-t&131071)/131072)),
jjj=c=>((((t*c)&128)/128)-.5)*s,
g=(d,l)=>d.map(l).reduce((a,b)=>a+b,0)/d.length,
(r(g(Arp(n=([[2,5/2,3,15/4],[4/3,2,3,11/3],[2,9/4,12/5,3,18/5],[2,8/3,32/9],[2,3,5/2,7/2],[8/7,12/7,2,3,24/7],[1,1.5,9/4,27/8],[4/3,5/3,2,8/3,10/3]][t>>17&7])),f),10240,.4))
+jjj(n[n.length-1])

t?0:d=0,
lp = (inp,w) => { 
	if (w == 0) return inp
	out = inp + d
	d = out / (1+1/w)
	return d / w
},
r=(x,y=12288,z=0.5)=>(t?0:a=Array(y).fill(0),b=x%256+a.shift(),a.push(b*z),b),
Arp=a=>a.slice(0,min(a.length,1+((t>>10)&127))),
f=b=>lp(((t*b)&255)/256-.5,8+(t&131071)/1024)*(s=((-t&131071)/131072)),
jjj=c=>((((t*c)&128)/128)-.5)*s,
g=(d,l)=>d.map(l).reduce((a,b)=>a+b,0)/d.length,
(r(g(Arp(n=([[2,5/2,3,15/4],[4/3,2,3,11/3],[2,9/4,12/5,3,18/5],[2,8/3,32/9],[2,3,5/2,7/2],[8/7,12/7,2,3,24/7],[1,1.5,9/4,27/8],[4/3,5/3,2,8/3,10/3]][t>>17&7])),f),10240,.4))
+jjj(n[n.length-1])

t?0:z1=[],callCount=0,lpf=lowPassFilter=(a,c)=>(call=callCount++,z1[call]??=0,z1[call]+=(a-z1[call])*c),hpf=highPassFilter=(a,c)=>a-lpf(a,c),pitches={st:1,downtones:4.8},pn=(x,a)=>2**((parseInt(x[a],36)+pitches.st)/12)/pitches.downtones,a=t=>t<0?0:hpf((((t*pn("0CV0COHJ8OMQAMTY",t>>13&15)&127)+32&128)-64)*abs(t/1048576%1-.5)**(t/8192%1),.005),s=(()=>{let s=0;for(let i=0;i<50;i++){s+=a(t-i*12288)/(abs(t/1048576%2-1)+1.25)**i}return s})()/256+(t/128*pn("000000008888AAAA",t>>13&15)&1)/4*"1001001010"[t>>13&7],lpf(s,min(t/1048576,1));

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

this is part 2/2.

song chooser:
sr=44100,t||(oldt=0,realt=0,olddiff=0,song=0),songNames=["42 melody","sierpenski harmony","street surfer"],songCode=[(t)=>(t*(42&t>>10)),(t)=>(t&t>>8),(t)=>(t&4096?t/2*(t^t%255)|t>>5:t/8|(t&8192?4*t:t))],difference=t-oldt,oldt=t,difference,realt++,sign(difference)!=sign(olddiff)?(song+=sign(difference),realt=0):difference/olddiff==2?(song+=sign(difference),realt=0):0,olddiff=difference,song=min(songCode.length-1,max(0,song)),realt%1024?songCode[song](floor(realt*8000/sr)):(()=>{throw songNames.map((a,b)=>((b==song?"\n>\xa0":"\n\xa0\xa0")+a)).join("")})()

from original: "detect your samplerate [link to "unnamed, for song chooser (detect your samplerate)"], then put it into sr and the sample rate part (important! it will not work otherwise)

use the play buttons to select the song"
released january 1, 2024. bytebeat, 44100hz.
remix of (just includes) stephanshi's minification of a beat by skurk & raer, erroneously referred to as "street surfer". original skurk beat at https://www.pouet.net/topic.php?post=388479 , raer's modification at https://www.pouet.net/topic.php?post=388494 , and stephanshi's minification at https://dollchan.net/bytebeat

unnamed, for song chooser (detect your samplerate):
sr=100000,
t||(realt=0),realt++,(()=>{throw floor(sr*realt/t)})()

released january 1, 2024. bytebeat, 100000hz.
original.

uwa!!:
old version: sr=48000,tempo=280,
t?0:(R=new Array(RL=floor(sr*0.3)),RI=0,N1={N:0,D:0,L:0,wave:(p)=>(4*((p%1)-(p%0.5))-1),l:0.1,d:.4},N2={N:0,D:0,L:0,wave:(p)=>(4*((p%1)-(p%0.5))-1),l:.05,d:.5},D={N:0,D:0,L:0,wave:random,l:0,d:.1,p:1}),nl=(sr*60)/tempo,ni=floor(t/nl)%32,pt=floor(t/(nl*32)),n1=[22,,20,22,15,,13,15,10,,8,10,5,,,,8,,6,8,13,,,,8,,6,8,16,,,],n2=!(pt&1)?[-4,,-2,,0,,,,-4,,-2,,0,,,,-5,,-3,,-1,,,,-7,,-5,,-3]:[-4,,-2,,0,,,,-4,,-2,,0,,,,-3,,-1,,1,,,,-7,,-5,,-3],DA={l:.05,d:.1},DB={l:.2,d:.1},DC={l:.4,d:.04},d=[DA,,DC,DA,DB,,,DC,DA,,DC,DA,DB,,,,DA,,DC,DA,DB,,,DC,DA,,DC,DA,DB,,,,DA],U=(N,n)=>(floor(t%nl)==0?(N.p?(N.l=n[ni]?.l||N.l,N.d=n[ni]?.d||N.d):(N.N=2**(n[ni]/12)||N.N),N.D=typeof n[ni]=="undefined"?N.D:sr*N.d):(N.D--)),P=(N)=>(l=N.l**(sr/48000),N.L=(1-l)*N.L+l*N.wave(t*(440/sr)*N.N)*max(0.,N.D/sr/N.d)),U(N1,pt<4?n1:pt<6?[]:pt<8?n1:[]),U(N2,pt<8?n2:[]),U(D,pt<4?[]:pt<8?d:[]),RI=++RI%RL,R[RI]=0.3*(R[RI]||0)+P(N1)*.4+P(N2)*.2+P(D)*.9

new version: sr=48000,tempo=280,
t?0:(R=new Array(RL=floor(sr*0.3)),RI=0,N1={N:0,D:0,L:0,wave:(p)=>(4*((p%1)-(p%0.5))-1),l:0.1,d:.4},N2={N:0,D:0,L:0,wave:(p)=>(4*((p%1)-(p%0.5))-1),l:.05,d:.5},D={N:0,D:0,L:0,wave:(()=>(random()-0.5)),l:0,d:.1,p:1}),nl=(sr*60)/tempo,ni=floor(t/nl)%32,pt=floor(t/(nl*32)),n1=[22,,20,22,15,,13,15,10,,8,10,3,,,,8,,6,8,13,,,,8,,6,8,16,,,],n2=!(pt&1)?[-13,,-9,,-2,,,,-13,,-9,,-2,,,,-15,,-11,,-4,,,,-15,,-11,,-7]:[-13,,-9,,-2,,,,-13,,-9,,-2,,,,-10,,-6,,1,,,,-10,,-6,,-3],DA={l:.05,d:.1},DB={l:.2,d:.1},DC={l:.4,d:.04},d=[DA,,DC,DA,DB,,DC,DA,,,DC,DA,DB,,,,DA,,DC,DA,DB,,DC,DA,,,DC,DA,DB,,,,DA],U=(N,n)=>(floor(t%nl)==0?(N.p?(N.l=n[ni]?.l||N.l,N.d=n[ni]?.d||N.d):(N.N=2**(n[ni]/12)||N.N),N.D=typeof n[ni]=="undefined"?N.D:sr

((t&255)*((t*((t>>10|t>>14)&15))&192)>>7)+((t&4095)<2048?(((1<<18)/(t&4095)+10000)&128):0)