Midi File With Python

mseq.py

# -*- coding: utf-8 -*-
"""
Created on Mon Jan  1 12:20:56 2024

@author: wsricardo
Instagram: @dimensao.alfa

Blog: wsricardo.blogspot.com
"""
# Matrix (array) data type for sequence
song = []

import mido
from pygame import mixer

"""
velocity - key pressed
time - time between notes

"""
mid = mido.MidiFile('song.mid', clip=True)
#print(mid.tracks)

def sseq( mid ):
    seq = []
    
    for track in mid.tracks:
        for msg in track:
            seq.append( 
                msg 
                     )
    
    return seq


def sseqn( seq ):
    """
    Parameters
    ----------
    seq : TYPE
        Array with messages for note_on in midi file.

    Returns
    -------
    l : TYPE
        Array of notes with time duration and sleep time between notes..

    """
    l = []
    count = 0
    
    for note in seq:
        current_time = note['time']
        current_note = note['note']
        
        if count % 2 == 0:
            last_time = current_time
            last_note = current_note
            current_time = note['time']
            current_note = note['note']
            l.append( { 
                       'note': current_note, 
                       'time': last_time + current_time,
                       'time_sleep': last_time
                       } )
            
        count += 1
        
    return l

def sseqmk( mid ):
    """
    

    Parameters
    ----------
    mid : midi
        Midi object loaded with mido.

    Returns
    -------
    seq : TYPE
        Sequence for messages of mid object.

    """
    
    seq = []
    for track in mid.tracks:
        for msg in track:
            if 'note' in msg.dict().keys():
                seq.append( {
                    'type': msg.dict()['type'], 
                    'time': msg.dict()['time'], 
                    'channel': msg.dict()['channel'], 
                    'note': msg.dict()['note'], 
                    'velocity': msg.dict()['velocity'] 
                    }  )
    return seq


#s = sseqmk( mid ) 
print( sseqn( sseqmk( mid ) ) )

#mixer.init() # initialization mixer for midi before play midi file
#mixer.music.load( mid.filename )
#mixer.music.play() # play midi file loaded with mido in variable "mid"