text_to_music.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'scissor'

if ARGV.size != 3
  puts "usage: #$0 infile textfile outfile"
  exit
end

src, textfile, dst = ARGV
text = open(textfile).read
s = Scissor(src)

instruments = (?!..?~).to_a.inject({}) do |m, c|
  m[c.chr.to_sym] = s[rand * (s.duration - 0.1), 0.1]
  m
end

Scissor.sequence(text, 0.1).apply(instruments) >> dst