asin(sin(t*(t&7e9|t&7e8)))

mel=t*2*[5, 12, 9, 11, 13, 7, 14, 10][t>>10&7],
arp=t*5*[5, 6, 8, 1][t>>10&3],
t=[mel*arp, mel>>arp][t>>11&1]

snare=atan(sin(t*54e2|t*54e3))*[1, 0, 1, 0][t>>13&3],
hihat=Math.floor(ceil(snare*[t>>11&3])),
melody=(atan(tan((t*.1*[.1, .2, .3, 0][t>>10&3])))),
t=(snare+hihat+melody)

t*4*[1,1.13,1.275,1/0.75,1.5,1.7,1.875,2][(t>>12)%8]

Speed=9,
SQ='0',
SW='0',
DRM='000000000000000000000000000000000000000100001000100001000100010010010101011111101010',
SNR='1010010101001010100101011010101001010101011101010101010101010101010010010011111001',


I = (D, AND)=> (t >> Speed >= D.length ? 0 : parseInt(D[t >> Speed], 36) * t / 10 & AND),
DR = (D, AND)=> (t >> Speed >= D.length ? 0 : (parseInt(D[t >> Speed], 10) * 1E5) / ((t % (1 << Speed)) + 1) & AND),
SR = D => (t >> Speed >= D.length ? 0 : parseInt(D[t >> Speed], 2) * Math.random() * 24),

+I(SQ, 64)
+I(SW, 63)
+DR(DRM, 100)
+SR(SNR)

17*t|(t>>2)+(t&32768?13:14)*t|t>>3|t>>4|t>>5|t>>6

-(t%((t&t>>16)))^(t*((0.0006510416666666667*t)&t>>16))

t*=4/3,s=t*(1+(t>>12&1))*2**([0,1,-2,1][t>>14&3]/12),(3E5/(t&8191)^random()*1024*(1-t/8192%1)**2*(t>>13&1)/(1+((t+(1<<13)>>9&31))))^(s^s*2&90)^(s%511^s%255)/2^(s*4.5&255)%(s/2&255)^s*4

const fs = require('fs');

const midiBuffer = fs.readFileSync('song.mid');
const midiBytes = Array.from(midiBuffer);

var midiString = Buffer.from(midiBytes).toString('base64');

let code = `
var BASE64_CHARS="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
function base64ToBytes(str){var clean=(str||"").replace(/=+$/,""),out=[];for(var i=0;i<clean.length;i+=4){var n=(BASE64_CHARS.indexOf(clean.charAt(i))<<18)|(BASE64_CHARS.indexOf(clean.charAt(i+1))<<12)|(BASE64_CHARS.indexOf(clean.charAt(i+2)||'A')<<6)|(BASE64_CHARS.indexOf(clean.charAt(i+3)||'A'));out.push((n>>16)&0xFF);if(clean.charAt(i+2)&&clean.charAt(i+2)!=='=')out.push((n>>8)&0xFF);if(clean.charAt(i+3)&&clean.charAt(i+3)!=='=')out.push(n&0xFF);}return out;}
function readVarLen(bytes,i){var value=0,b;do{b=bytes[i++];value=(value<<7)|(b&0x7F);}while(b&0x80);return {value,nextIndex:i};}
function splitTracks(bytes){var i=0;if(String.fromCharCode(bytes[i],bytes[i+1],bytes[i+2],bytes[i+3])!=='MThd')throw new Error('Invalid MIDI header');var hl=(bytes[i+4]<<24)|(bytes[i+5]<<16)|(bytes[i+6]<<8)|bytes[i+7];var format=(bytes[i+8]<<8)|bytes[i+9],nTracks=(bytes[i+10]<<8)|bytes[i+11],tpq=(bytes[i+12]<<8)|bytes[i+13];i+=8+hl;var tracks=[];for(var t=0;t<nTracks;t++){if(String.fromCharCode(bytes[i],bytes[i+1],bytes[i+2],bytes[i+3])!=='MTrk')throw new Error('Invalid track header');var tl=(bytes[i+4]<<24)|(bytes[i+5]<<16)|(bytes[i+6]<<8)|bytes[i+7];tracks.push(bytes.slice(i+8,i+8+tl));i+=8+tl;}return{format,tpq,tracks};}
function parseTrackToEvents(bytes){var events=[],i=0,tick=0,lastStatus=null;while(i<bytes.length){var dt=readVarLen(bytes,i);tick+=dt.value;i=dt.nextIndex;if(i>=bytes.length)break;var statusByte=bytes[i],status;if(statusByte>=0x80){status=statusByte;lastStatus=status;i++;}else{if(!lastStatus)break;status=lastStatus;}var cmd=status&0xF0,channel=status&0x0F;if(status===0xFF){var mt=bytes[i++],lenInfo=readVarLen(bytes,i),len=lenInfo.value;i=lenInfo.nextIndex+len;if(mt===0x51&&len===3){var tempo=(bytes[i-3]<<16)|(bytes[i-2]<<8)|bytes[i-1];events.push({tick,type:"setTempo",tempo});}continue;}if(cmd===0xC0){var program=bytes[i++];events.push({tick,type:"programChange",channel,program});continue;}if(cmd===0x90||cmd===0x80){var d1=bytes[i++],d2=bytes[i++];if(cmd===0x90&&d2>0)events.push({tick,type:"noteOn",note:d1,velocity:d2,channel});else events.push({tick,type:"noteOff",note:d1,channel});continue;}if(cmd===0xA0||cmd===0xB0||cmd===0xE0){i+=2;continue;}if(cmd===0xD0){i+=1;continue;}i++;}return events;}
function ticksToSecondsAndNotes(bytes){var midi=splitTracks(bytes),tpq=midi.tpq,all=[];for(var t=0;t<midi.tracks.length;t++){var evs=parseTrackToEvents(midi.tracks[t]);for(var k=0;k<evs.length;k++)all.push(evs[k]);}all.sort((a,b)=>a.tick-b.tick);var tempo=500000;for(var i=0;i<all.length;i++){if(all[i].type==="setTempo"){tempo=all[i].tempo;break;}}var lastTick=0,lastSec=0;for(var i=0;i<all.length;i++){var ev=all[i];var dt=ev.tick-lastTick;var secDelta=(dt*tempo)/(tpq*1000000);lastSec+=secDelta;ev.time=lastSec;if(ev.type==="setTempo")tempo=ev.tempo;lastTick=ev.tick;}var notes=[],openNotes={},channelPrograms=new

x=t==0?0:x,x=x%2==0?x/2:(3*x)+1,x

t*(t&16384?6:5)*(5-(3&t>>(t&4096?7:14)))>>(3&t>>9)|t>>3