-
 module.exports = (grunt) ->
   fs = require("fs")
 

        src: '**/*.coffee'     # traverse *.coffee files relative to cwd
        dest: 'build/test'     # destination for compiled js files
        ext: '.js'             # file extension for compiled files
        filter: hasChanged("coffee.test")
        options:
          sourceMap : true
      demo:

        src: '**/*.coffee'     # traverse *.coffee files relative to cwd
        dest: 'build/demo/js'  # destination for compiled js files
        ext: '.js'             # file extension for compiled files
        options:
          sourceMap : true
      spectrogram:
