[code]
t*(t&16384?6:5)*(3+(3&t>>(t&2048?7:14)))>>(3&t>>9)|t>>2
[/code]

[Awesome tune](https://dollchan.net/bytebeat/#v3b64K9HSKFEzNDO2MLE3szLV1NIw1tYwViuxswMKGxmYWNibWxmaaGpqAgXAwpaaNUDSCAA=)

sq=(f,p=0.5)=>2*((s*tone(f)%1)<p)-1, 
s=t/48000,
b=94,
r=-1/0,
tone=(note)=>440*(2**((note-9)/12)),
q=(a)=>s%(60/a)*a/60,
F=(a)=>sin(2*PI*s*a),
st=(j)=>F(tone(j)),
bass=(k)=>asin(sin(s*2*PI*440*(2**((k-9)/12))))/PI*2,
cyc=(p,l)=>(floor(p/60*s))%l,
dec=(s,r=1)=>(1-q(s))**r,
lfo=(f,a,w,p=0,o=0)=>
[sin(f*2*PI*s+p)*a+o,
sign(sin(f*2*PI*s+p))+o,
(s+p)%(1/f)*f*a+o,
random()][w], 
sum=(Ar)=>Ar.reduce((a,b)=>a+b,0),
R=random(),
Cho=(Ar,Fn)=>sum(Ar.map(Fn))/Ar.length,
ω=(a)=>{throw a},
p=(a,b)=>a!=b?a:r,
avg=(a)=>sum(a)/a.length,
Kick=_=>F(exp(q(_)*-19)*30/s),
Snare=(a)=>Kick(a)/2+R*dec(a,2)/2,
T=(M)=>(M[0].map((_,i) => M.reduce((A, R) => [...A, R[i]], []))),
Hat=_=>R*dec(_),
Chords={Maj:[0,4,7],
Min:[0,3,7],
Dim:[0,3,6],
Aug:[0,4,8],
Qua:[0,4,7,10],
Mi7:[0,3,7,10],
Ma7:[0,4,7,11],
Di7:[0,3,6,9],
mM7:[0,3,7,11]},
output=st(">@BEGJLN".charCodeAt(cyc(b*2,8))-64)*dec(b*2,2)+bass(">2;9".charCodeAt(cyc(b/4,4))-64)/2*dec(b/4,2)// the deafult code

(t>0 & t<237568)*( t&t>>8 ) |
(t>245760 & t<475136)*( t>>5|(t>>2)*(t>>5) ) |
(t>483328 & t<724992)*( ( (t>>5&t)-(t>>5)+(t>>5&t) )+( t*(((t + 40960 )>>14)&14) ) ) |
(t>729088 & t<966656)*( t+(t&t^t>>6)-t*((t>>9)&(t%16?2:6)&t>>9) ) |
(t>970752 & t<1208320)*( t*(t^t+((t-970752)>>15|1)^(t-1280^t)>>10) ) |
(t>1212416 & t<1437696)*( t*((t/2>>10|t%16*t>>8)&8*t>>12&18)|-(t/16)+64 ) |
(t>1441792 & t<1679360)*( t*(t&16384?6:5)*(4-(1&t>>8))>>(3&t>>9)|(t|t*3)>>5 ) |
(t>1683456 & t<1900544)*( t*((t&4096?6:16)+(1&(t+16384)>>14))>>(3&t>>8)|t>>(t&4096?3:4) ) |
(t>1900544)*( t*((t&4096?t%65536<59392?7:t&7:16)+(1&t>>14))>>(3&-t>>(t&2048?2:10))|t>>(t&16384?t&4096?10:3:2) )

t/=8000,

/* main arpeggio (C/F chords) */
p1=t%0.95,
c=Math.floor(t/0.95)%2,
n=p1<0.35?(c?349.23:261.63):
  p1<0.7?(c?440:329.63):
           (c?523.25:392),

/* top layer aligned with chord */
h=c?698.46:523.25,

/* third layer (C6 sequence) */
seq=[1046.50,1174.66,1318.51,1046.50,1396.91,1567.98,1760.00,1567.98], // C6,D6,E6,C6,F6,G6,A6,G6
note_len=0.2375,
idx=Math.floor(t/note_len)%8,
l=seq[idx],

/* final mix */
(Math.sin(6.28318*n*t)*0.5 + Math.sin(6.28318*h*t)*0.3 + Math.sin(6.28318*l*t)*0.5)*0.7*127+128

((((t>>((t%(t/5)+t%(t/3)-t%60)-1)%400^t>>t%30)%42+t/30&128&&-1)+t/(t&16384?7:9)&(t&8192?173:192)+random()*(t/16%42+(3&-t>>2))-(t/(255&t>>12)&1)*(t&4096?4:3&t>>t))+(1&t*(t>>8&t>>13)>>7)*(t&8192&&10)^t%(2*PI)+(1&t>>t%(8*PI)))+(3&t*(t>>5|t>>8)>>6>>t/65536)*(1^3&t>>8)|random()*(t&300)/(1+(t>>8&255))+(t&t>>8&&1+(3&~t>>9))^(t&1|t>>1&2^t>>3&1)&(t>>2&3|t>>3&2^(t|t>>4)&1)

((t%4800>4780)*100) + (((t+40)%4800>4780)*100) + (((t+80)%4800>4780)*100) + ((t+2400)%4800>4600)*(t&t*25|(t*2)>>2&t)

x=(t,y=256)=>(t/4*(4|7&t>>15)>>(~t>>13&1)&128|t/4*(t>>13&t>>15)*(~t>>11&3)&127)%y,l=16,(t?f+=x(t)-f/l:f=0),[f/l,(x(t)+x(t+1)+x(t+2)+x(t+3)+x(t+4)+x(t+5)+x(t+6)+x(t+7)+x(t+8)+x(t+9)+x(t+10)+x(t+11)+x(t+12)+x(t+13)+x(t+14)+x(t+15))/16]

c=x=>t*2**((x-1.9)/12),r=t/1.1,((p=c([0,0,3,3,5,5,3,2,0,0,-2,-2,-4,-4,-5,-1][15&r>>14]))&-r>>6)%256/3+(p/2%256/8+p/2%254/8)*(262144<r)+random()*(-r*'2112'[3&r>>13]&4095)/96*(524288<r)+(t*sin(r/1.5>>1)&-r>>7&255)*(r&16384)/32E3*(786432<r)+(32*sin(3E3/(r%16384)**.01)+32)*(1048576<r)

t*(85&t>>9)|t*(42&t>>8)

t=t*8000/44100,
a=((t/4*(4|t>>13&3)>>(~t>>11&1)&32)+(t/4*(t>>11&t>>13)*(~t>>9&3)&31)),
b=cos(12*cbrt(t%4096))*32+32,
c=(t*random()|t/8>>2)&31,
d=(t*random()|t/8>>2)&31,
[a+b+c+40,a+b+d+40]

p=3*(t-(t>>10&4|t>>13&3|t>>17&6|t>>14&4)*t/((t>>16&7)+4))/1.56,d=3*(t-(t>>10&4|t>>13&3|t>>a17&6|t>>14&4)*t/((t>>16&7)+4))*1.91,(p&255)/3+(d&255)/2.5

t*=20,[1,1,1,2,3.5,4.1,2.51,1.9][t>>11&7]*t/128*(-t>>16&15)%+(t>>10)