add ainote

gistfile1.rb

# inspired by https://github.com/negipo/ainote

require 'scissor/echonest'

def ainote(dir)
  Scissor(dir + '/%i.m4a' % rand(5))
end

def main
  ainote_dir, source_file = ARGV

  src_track    = Scissor(source_file)
  ainote_track = Scissor.silence(src_track.duration)
  bars         = src_track.bars

  bars.each do |bar|
    ainote = ainote(ainote_dir)
    ainote_track = ainote_track.replace(bar.start, [ainote.duration, bar.duration].min, ainote)
  end

  Scissor.mix([src_track, ainote_track], 'ainote.mp3', :overwrite => true)
end

main