Security News
The Hidden Blast Radius of the Axios Compromise
The Axios compromise shows how time-dependent dependency resolution makes exposure harder to detect and contain.
By Ahmad Nassri - Apr 01, 2026
New Research: Supply Chain Attack on Axios Pulls Malicious Dependency from npm.Details → →
riffplay
Play user defined sequence.
Example page
<html>
<head>
<script src="https://surikov.github.io/riffplay/riffplay_module.js"></script>
</head>
<body>
<h1>test</h1>
<p><a id='linktest' href='#'>click</a>
<script>
var tempo = '120';
var drums = [{"drum":0,"beat":0}, {"drum":5,"beat":0}
,{"drum":2,"beat":4}, {"drum":5,"beat":4}
,{"drum":0,"beat":8}, {"drum":5,"beat":8}
,{"drum":2,"beat":12},{"drum":5,"beat":12}
];
var notes = [{"track":5,"beat":0 ,"length":2,"shift":0,"pitch":9}
,{"track":5,"beat":4 ,"length":2,"shift":0,"pitch":4}
,{"track":5,"beat":8 ,"length":2,"shift":0,"pitch":9}
,{"track":5,"beat":12,"length":2,"shift":0,"pitch":4}
];
var songlink = encodeRiffURL(tempo,drums,notes);
document.getElementById('linktest').onclick=function(){
console.log(songlink);
window.open(songlink);
};
</script>
</body>
</html>
Live example
See live example https://surikov.github.io/riffplay/test.html
How to use
Main function
var songlink = encodeRiffURL(tempo,drums,notes);
Parameters:
- tempo - BPM
- drums - array of drum notes
- drum - id of drum (see below)
- beat - step in 16th's
- notes - array of instrument notes
- track - id of instrument (see below)
- beat - step in 16th's
- length - duration in 16th's
- shift - pitch slide in halftones
- pitch - note pitch
Return
URL with encoded playable melody. Use this URL as a link.
Tempo
tempo is 80-240
Drum IDs
0.Bass drum 1.Low Tom 2.Snare drum 3.Mid Tom 4.Closed Hi-hat 5.Open Hi-hat 6.Ride Cymbal 7.Splash Cymbal
Instrument IDs
0.Distortion guitar 1.Acoustic guitar 2.Percussive Organ 3.PalmMute guitar 4.Acoustic Piano 5.Bass guitar 6.String Ensemble 7.Synth Bass
Human readable names
Use this code
var C=0,Cs=1,D=2,Ds=3,E=4,F=5,Fs=6,G=7,Gs=8,A=9,As=10,B=11;
var O=12;
//
var BassDrum=0;
var LowTom=1;
var SnareDrum=2;
var MidTom=3;
var ClosedHiHat=4;
var OpenHiHat=5;
var RideCymbal=6;
var SplashCymbal=7;
//
var DistortionGuitar=0;
var AcousticGuitar=1;
var PercussiveOrgan=2;
var PalmMuteGuitar=3
var AcousticPiano=4;
var BassGuitar=5
var StringEnsemble=6;
var SynthBass=7;
Example of melody definition
var tempo = '120';
var drums = [{"drum":BassDrum,"beat":0},{"drum":OpenHiHat,"beat":0}
,{"drum":SnareDrum,"beat":4},{"drum":ClosedHiHat,"beat":4}
,{"drum":MidTom,"beat":7},{"drum":ClosedHiHat,"beat":7}
,{"drum":BassDrum,"beat":8},{"drum":OpenHiHat,"beat":8}
,{"drum":SnareDrum,"beat":12},{"drum":ClosedHiHat,"beat":12}
,{"drum":LowTom,"beat":15},{"drum":ClosedHiHat,"beat":15}
];
var notes = [{"track":BassGuitar,"beat":0 ,"length":8,"shift":0,"pitch":E+O*0},{"track":PercussiveOrgan,"beat":0 ,"length":4,"shift":0,"pitch":B+O*1},{"track":PercussiveOrgan,"beat":0 ,"length":4,"shift":0,"pitch":E+O*2}
,{"track":PercussiveOrgan,"beat":7 ,"length":1,"shift":0,"pitch":E+O*2},{"track":PercussiveOrgan,"beat":7 ,"length":1,"shift":0,"pitch":G+O*2}
,{"track":BassGuitar,"beat":8 ,"length":8,"shift":0,"pitch":G+O*0},{"track":PercussiveOrgan,"beat":8 ,"length":4,"shift":0,"pitch":E+O*2},{"track":PercussiveOrgan,"beat":8 ,"length":4,"shift":0,"pitch":G+O*2}
,{"track":PercussiveOrgan,"beat":15 ,"length":1,"shift":0,"pitch":As+O*1},{"track":PercussiveOrgan,"beat":15 ,"length":1,"shift":0,"pitch":Ds+O*2}
];
var songlink = encodeRiffURL(tempo,drums,notes);
Live example
See live example https://surikov.github.io/riffplay/test2.html
NPM
"dependencies": {
"riffplay": "^1.0.3"
}
var m = require('riffplay');
var songlink = encodeRiffURL(tempo, drums, notes);
Embedded code
FAQs
Create link to riff
We found that riffplay demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Package last updated on 11 Jan 2019
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