Midi threading puzzle...

main.rb

# NOTE:
# the following code works GREAT, since UniMIDI::Input#gets blocks (just like stdin's gets)
input = UniMIDI::Input.use(:first)
Thread.new do
  loop { p input.gets }
end


# ...but the following code only returns once and no subsequent notes are printed...
# test of Sequencer::Reader
# also note that in real life this is called via a program that doesn't immediately exit! (the UI event loop)
reader = Sequencer::Reader.new
reader.start

# if you bang on a midi device you'll only see gets return ONCE and never return again. Weird.
# I would LOVE to hear some theories about this...

reader.rb

class Sequencer
  class Reader
    attr_reader :notes

    def initialize(input=nil)
      @input ||= UniMIDI::Input.use(:first)
      @notes = []
    end

    def start
      @notes = []
      @thread = create_thread
    end

    def stop
      @notes = @thread[:notes]
      Thread.kill(@thread)
      return @notes
    end

    private

    def is_key_on?(note)
      note[:data][0] == 0x90
    end

    def create_thread
      Thread.new do
        Thread.current[:notes] = []

        loop do
          puts "searching!"
          note = @input.gets
          p note

          if is_key_on?(note)
            Thread.current[:notes] << note
          end
        end
      end
    end
  end
end