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semi_random_midi_gen.py
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semi_random_midi_gen.py
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import madmom
import numpy as np
import random
"""
This script contains methods to generate semi-random MIDI files with a number of inputs
"""
def generate_midi(number_of_onsets,file_name,start_note=10,end_note=100,inter_note_gap=0.3,velocity_min=60,velocity_max=127,onset_type='s',type=0):
#onset structure = [time,note,duration,velocity]
#nonset_type == 's' --> single notes
#onset_type == 'c2' --> two notes at a time
#onset_type == 'c3' --> three notes at a time
note_time = 0
if(type == 0):
if(onset_type == 's'):
onsets = np.empty((number_of_onsets,4))
for i in range(number_of_onsets):
note_time += inter_note_gap
onsets[i] = [note_time,random.randint(start_note, end_note),0.5,random.randint(velocity_min,velocity_max)]
elif(onset_type == 'c2'):
onsets = np.empty((number_of_onsets*2,4))
for i in range(number_of_onsets*2):
if(i%2 == 0): note_time += inter_note_gap
onsets[i] = [note_time,random.randint(start_note, end_note),0.5,random.randint(velocity_min,velocity_max)]
elif(onset_type == 'c3'):
onsets = np.empty((number_of_onsets*3,4))
for i in range(number_of_onsets*3):
if(i%3 == 0): note_time += inter_note_gap
onsets[i] = [note_time,random.randint(start_note, end_note),0.5,random.randint(velocity_min,velocity_max)]
elif(onset_type == 'both'):
onsets = np.empty((number_of_onsets*2,4))
for i in range(number_of_onsets*2):
if(i%2 == 0):
note_time += inter_note_gap
start_note = 20
end_note = 79
elif(i%2 == 1):
start_note = 79
end_note = 110
onsets[i] = [note_time,random.randint(start_note, end_note),0.5,random.randint(velocity_min,velocity_max)]
m = madmom.io.midi.MIDIFile.from_notes(onsets)
madmom.io.midi.MIDIFile.save(m,file_name)
def generate_midi_2(file_name,how_many_times,start_note=10,end_note=100,inter_note_gap=0.3,velocity_min=60,velocity_max=127,onset_type='s'):
note_time = 0
onsets = []
for i in range(how_many_times):
for i in range(start_note,end_note):
if(onset_type == 's'):
note_time += inter_note_gap
onsets.append([note_time,i,0.3,random.randint(velocity_min,velocity_max)])
if(onset_type == 'c2'):
note_time += inter_note_gap
onsets.append([note_time,i,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+(random.randint(1,8)),0.3,random.randint(velocity_min,velocity_max)])
if(onset_type == 'c3_major'):
note_time += inter_note_gap
onsets.append([note_time,i,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+4,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+7,0.3,random.randint(velocity_min,velocity_max)])
if(onset_type == 'c3_minor'):
note_time += inter_note_gap
onsets.append([note_time,i,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+3,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+7,0.3,random.randint(velocity_min,velocity_max)])
if(onset_type == 'c3_rand'):
note_time += inter_note_gap
onsets.append([note_time,i,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+(random.randint(1,4)),0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+(random.randint(5,8)),0.3,random.randint(velocity_min,velocity_max)])
if(onset_type == 'c4_major'):
note_time += inter_note_gap
onsets.append([note_time,i,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+4,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+7,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+11,0.3,random.randint(velocity_min,velocity_max)])
if(onset_type == 'c4_minor'):
note_time += inter_note_gap
onsets.append([note_time,i,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+3,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+7,0.3,random.randint(velocity_min,velocity_max)])
onsets.append([note_time,i+11,0.3,random.randint(velocity_min,velocity_max)])
m = madmom.io.midi.MIDIFile.from_notes(onsets)
for i in range(6):
madmom.io.midi.MIDIFile.save(m,(file_name+str(i+1)+'.mid'))
file_name = '../Generated Data 2/Logic_three_note_chords_2/therapist_three_note_chord_major_'
how_many_times = 4
start_note = 0
end_note = 72
inter_note_gap = 0.5
onset_type = 'c3_major'
generate_midi_2(file_name,how_many_times,start_note,end_note,inter_note_gap,onset_type=onset_type)