launchpad-midi-converter

Installation

CDN
The easiest way is to link the launchpad-midi-converter library from the jsDelivr CDN. To retrieve the latest version, just add this to your HTML page:

<script src="https://cdn.jsdelivr.net/npm/launchpad-midi-converter"></script>

If you want to target a specific version, you might prefer:

<script src="https://cdn.jsdelivr.net/npm/launchpad-midi-converter@0.2.0"></script>

Manual
You can download the latest release of launchpad-midi-converter, uncompress it, grab the LPMidiConverter.min.js file and copy it to your project. So you can link it to your HTML page.

NPM
Might be the best way if you want to use it with Node
npm install launchpad-midi-converter
You can link it to your HTML page like this:

<script src="node_modules/launchpad-midi-converter/LPMidiConverter.min.js"></script>

Usage

Node

const launchpad = require("launchpad-midi-converter");
launchpad.layout("programmer");

HTML

<script>
    LPMidiConverter.layout("live");
</script>

Documentation

Modes or Layouts availables...

• Live Mode (Green) => live
• Programmer Mode (Orange) => programmer

.layout(mode)

Where mode is the layout we want. (See Mode or Layouts availables...). Returns an array of every notes in the right order. Example:

>>> LPMidiConverter.layout("programmer")
[
  [81, 82, 83, 84, 85, 86, 87, 88],
  [71, 72, 73, 74, 75, 76, 77, 78],
  [...]
]

Take note that CC notes aren't included in the layouts. Currently working on it...

.convert(note, from, to)

Where note is the note we want to convert (eg.: 11), from is the layout where the note comes from (eg.: 11 comes from the programmer layout) and to is the final layout (eg.: live layout).

>>> LPMidiConverter.convert(11, "programmer", "live")
36

Explanations: We take the programmer layout and we search where the note, so 11, is placed in the layout. Now we take the live layout and we read the note where 11 was placed in the programmer layout, so 36 here. (Needs to be explaned well, my english is so bad).

.color(velocity)

Where velocity is between 0 and 127. It returns the HEX color value of the velocity given. Based on default Novation Launchpad color palette.

>>> LPMidiConverter.color(1)
"1c1c1c"

This function isn't optimised, it's just hardcoded... If theres a better way to do it, please contribute !

Want to help ?

Just clone this repo and everything is in src/LPMidiConverter.js ! Minified file is made with minify (npm i -g minify). Just go in your working directory and type npm run minify and it will overwrite LPMidiConverter.min.js. Hope I explained well !