(Code)

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

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)

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

r=random,s=sin,kf=50+r()*10,sf=300+r()*200,hf=4000+r()*2000,st=t>>12,p=t%4096,k=st%4==0?s(p*kf*0.001)*exp(-p/400):0,sn=st%4==2?s(p*sf*0.003)*exp(-p/300):0,h=st%2==1?s(p*hf*0.01)*exp(-p/100):0,[128+127*(k+sn*0.8),128+127*(k+h*0.8)]

(((t^t>>5|t^t>>6)&t>>4)>>8)*(t^t>>8)

(1024/(t%4096))*256

s=t>>17&1,t>>"45"[s]&t*"2256"[t>>13&3]|[1e4,[5e3,5e4][t>>13&1]][s]/(t%[4096,8192][s])