Midi Logger for #SonicPi

midi_logger.rb

key_pressed_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
key_released_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
amp = 0.5
key_pressed_in_chord = false
midi_device = "/midi/digital_piano/0/1/note_on"
log_file_path = "C:\\Users\\Manuel\\Documents\\sonicpi\\logger.log"

live_loop :midi_logger do
  note, velocity = sync midi_device
  # File.write(log_file_path, "# debug >> [%d,%d]\n" % [note, velocity], mode: "a")
  if velocity != 0
    key_pressed_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
    timespan_between_notes = key_pressed_time - key_released_time
    sleep_cmd = "sleep %0.3f\n" % timespan_between_notes
    File.write(log_file_path, sleep_cmd, mode: "a") if key_pressed_in_chord == false
    amp = velocity / 127.0
    key_pressed_in_chord = true
  else
    key_pressed_in_chord = false
    key_released_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
    timespan_key_was_pressed = key_released_time - key_pressed_time
    played_note_cmd = "play %d, amp: %0.2f, sustain: %0.3f\n" % [note,
                                                                 amp,
                                                                 timespan_key_was_pressed]
    File.write(log_file_path, played_note_cmd, mode: "a")
  end
end