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Published 20 hours ago • verified publisher icon KilledByAPixel
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A Tiny JavaScript Sound FX System

ZzFX - Zuper Zmall Zound Zynth

ZzFX Sound Designer / ZzFX Sound Board Demo

ZzFX Features

  • Tiny sound generator with 20 controllable parameters
  • Play audio via code, no need for sound asset files
  • Compatible with nearly all web browsers
  • Small code footprint, the micro version is under 1 kilobyte uncompressed
  • Can produce a large variety of sound effect types
  • Sounds can be played with a short function call. zzfx(...[,,,,.1,,,,9])
  • No additional libraries or dependencies are required
  • Open source with MIT license, you can use this for anything!

Why Use ZzFX?

  • You can quickly add or change sound effects with just one line of code
  • Without sound asset files your game is smaller and faster for users to download
  • While prototyping you can use ZzFX for placeholder sound effects
  • For size limited game jams like JS13K, ZzFX uses very minimal overhead
  • ZzFX is not just for games, you can use it to easily add sounds to any website

How to Use

  • Download from github or use npm install zzfx
  • Import ZZFX as a module with using import {ZZFX, zzfx} from './ZzFX.js'
  • Or paste the code from ZzFXMicro.min.js
  • To play a sound just call zzfx(), something like zzfx(...[,,,,.1,,,,9])
  • Use the ZzFX sound designer web app to create new sounds

Here are a few more examples examples...

zzfx(...[,,925,.04,.3,.6,1,.3,,6.27,-184,.09,.17]); // Game Over
zzfx(...[,,537,.02,.02,.22,1,1.59,-6.98,4.97]); // Heart
zzfx(...[1.5,.8,270,,.1,,1,1.5,,,,,,,,.1,.01]); // Piano
zzfx(...[,,129,.01,,.15,,,,,,,,5]); // Drum

ZzFX Image

ZzFX Music

ZzFX Micro Code

Here's all the code you need to play ZzFX sounds with JavaScript!

// ZzFXMicro - Zuper Zmall Zound Zynth - v1.1.7 ~ 900 bytes minified
zzfxV=.3 // volume
zzfx=    // play sound
(p=1,k=.05,b=220,e=0,r=0,t=.1,q=0,D=1,u=0,y=0,v=0,z=0,l=0,E=0,A=0,F=0,c=0,w=1,m=0,B=0)=>{let
M=Math,R=44100,d=2*M.PI,G=u*=500*d/R/R,C=b*=(1-k+2*k*M.random(k=[]))*d/R,g=0,H=0,a=0,n=1,I=0
,J=0,f=0,x,h;e=R*e+9;m*=R;r*=R;t*=R;c*=R;y*=500*d/R**3;A*=d/R;v*=d/R;z*=R;l=R*l|0;for(h=e+m+
r+t+c|0;a<h;k[a++]=f)++J%(100*F|0)||(f=q?1<q?2<q?3<q?M.sin((g%d)**3):M.max(M.min(M.tan(g),1)
,-1):1-(2*g/d%2+2)%2:1-4*M.abs(M.round(g/d)-g/d):M.sin(g),f=(l?1-B+B*M.sin(d*a/l):1)*(0<f?1:
-1)*M.abs(f)**D*p*zzfxV*(a<e?a/e:a<e+m?1-(a-e)/m*(1-w):a<e+m+r?w:a<h-c?(h-a-c)/t*w:0),f=c?f/
2+(c>a?0:(a<h-c?1:(h-a)/c)*k[a-c|0]/2):f),x=(b+=u+=y)*M.cos(A*H++),g+=x-x*E*(1-1E9*(M.sin(a)
+1)%2),n&&++n>z&&(b+=v,C+=v,n=0),!l||++I%l||(b=C,u=G,n=n||1);p=zzfxX.createBuffer(1,h,R);p.
getChannelData(0).set(k);b=zzfxX.createBufferSource();b.buffer=p;b.connect(zzfxX.destination
);b.start();return b};zzfxX=new(window.AudioContext||webkitAudioContext) // audio context

ZzFX UI Features

  • Generates random sounds from presets
  • Sound list is automatically saved
  • Each parameter can be modified with constraints
  • Lock and mutate buttons for each parameter
  • Sounds can be renamed
  • Shortens code for zzfx sound calls
  • Displays image of sound wave when played
  • Sounds can be marked as favorites to prevent removal
  • Sounds can be loaded by pasting zzfx code for easy sharing
  • List of sounds can be exported and imported
  • Supports drag-and-drop of exported files into sound list
  • Supports saving sounds as wav files for offline playback

Games Using ZzFX

ZzFX Image

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A Tiny JavaScript Sound FX System

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