07-midifile-with-mido.py - Reading a MIDI file with mido and sending the events to pyo.
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This example shows how simple it is to play a MIDI file with mido and send the events
to an audio synth build with pyo.

.. code-block:: python

    from pyo import *
    
    # Try to import MidiFile from the mido module. You can install mido with pip:
    #   pip install mido
    
    try:
        from mido import MidiFile
    except:
        print("The `mido` module must be installed to run this example!")
        exit()
    
    s = Server().boot().start()
    
    # A little audio synth to play the MIDI events.
    mid = Notein()
    amp = MidiAdsr(mid["velocity"])
    pit = MToF(mid["pitch"])
    osc = Osc(SquareTable(), freq=pit, mul=amp).mix(1)
    rev = STRev(osc, revtime=1, cutoff=4000, bal=0.2).out()
    
    # Opening the MIDI file...
    mid = MidiFile("../snds/mapleleafrag.mid")
    
    # ... and reading its content.
    for message in mid.play():
        # For each message, we convert it to integer data with the bytes()
        # method and send the values to pyo's Server with the addMidiEvent()
        # method. This method programmatically adds a MIDI message to the
        # server's internal MIDI event buffer.
        s.addMidiEvent(*message.bytes())