test_player.rb

#!/usr/bin/env ruby

$: << File.expand_path(File.join(__FILE__,"..","..", "lib"))
require 'paula/mdxmini'
require 'paula/xmp'
require 'open3'

# player = Paula::XMP::Player.new ARGV[0], frequency: 44100, loops: 1
player = Paula::MDXMini::Player.new ARGV[0], frequency: 44100, loops: 1
stdin, stdout, stderr, thr = Open3.popen3(*%w[play -b 16 -r 44100 -c 2 -e signed-integer -t raw -q -])

player.each do |sample|
  stdin.write sample
end