import pretty_midi

# Create a PrettyMIDI object
#Create a Pretty MIDI object.
cello_c_chord = pretty_midi.PrettyMIDI()

# Create an Instrument instance for a cello instrument
#Create an Instrument Instance. Here Cello

#Enter the instrument name and it will return the corresponding General MIDI program number
cello_program = pretty_midi.instrument_name_to_program('Cello')


#Create Instrument instance as Cello
cello = pretty_midi.Instrument(program=cello_program)


# Iterate over note names, which will be converted to note number later
#The melody is described by NoteName, but it will be converted to NoteNumber later.

for note_name in ['C5', 'E5', 'G5']:
    # Retrieve the MIDI note number for this note name
    #Searching for Note Number from Note Name.
    note_number = pretty_midi.note_name_to_number(note_name)

    # Create a Note instance, starting at 0s and ending at .5s
    #Create a NoteInstance. sound(pitch)Start time and end time,
    #Define velocity.
    note = pretty_midi.Note(
        velocity=100, pitch=note_number, start=0, end=.5)
    
    # Add it to our cello instrument
    #Add the NoteInstance created above to the Cello Instrument.
    cello.notes.append(note)
    
    
# Add the cello instrument to the PrettyMIDI object
#Add the Chello Instrument to the PrettyMIDI object.
cello_c_chord.instruments.append(cello)


# Write out the MIDI data
#Export a PrettyMIDI object as a MIDI file.
cello_c_chord.write('cello-C-chord.mid')

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