poco ♫

Reverse chord lookup at lightning speed in Javascript (1kb)

How?

poco uses teoria to generate an indexed table of all chords, including inversions. This table is used to look up chords and therefore doesn’t run any calculations. This make Poco over 400x faster (800x on iOS) at chord recognition than piu.

Why?

I'm a huge fan of teoria. poco was created before I discovered piu. Both use different methods to lookup chords. poco happens to be faster and smaller, so I thought I'd share it.

Installation

	npm install pocojs

Usage

Initialise poco

	poco.init();

Find a chord

	poco.find(['a','c','e','g']);

	/* returns...
	{
		name: 'Amin7', 
		othernames:['C6/A'], 
		inversion:0, 
		t: [teoria chord object]
	}
	*/

Example https://tonicdev.com/npm/pocojs

#License

The MIT License

Copyright (c) 2010-2014 Nic Mulvaney

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.