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midimapper.py
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import math
import mido
from mido import Message
def freq_to_midi_pitch(frequency):
# MIDI pitch values are defined such that A4 (A above middle C) has a pitch value of 69,
# with each semitone above or below A4 having a pitch value 1 higher or lower respectively.
a4_pitch = 69
a4_freq = 440 # A4 frequency (Hz)
semitones_above_a4 = 12 * math.log2(frequency / a4_freq)
pitch = a4_pitch + semitones_above_a4
if pitch > 127:
pitch = 127
elif pitch < 0:
pitch = 0
return int(pitch)
def midimap(primary_frequency_tuples, amino_frequency_tuples, protein_frequency_dict, filename):
# Create a new MIDI file
mid = mido.MidiFile()
# Create three new tracks
track_1 = mido.MidiTrack()
track_name = mido.MetaMessage("track_name", name='Primary')
track_1.append(track_name)
track_2 = mido.MidiTrack()
track_name = mido.MetaMessage("track_name", name='Amino acids')
track_2.append(track_name)
track_3 = mido.MidiTrack()
track_name = mido.MetaMessage("track_name", name='Proteins')
track_3.append(track_name)
mid.tracks.append(track_1)
mid.tracks.append(track_2)
mid.tracks.append(track_3)
# Set the tempo for all three tracks
track_1.append(Message('control_change', control=0x51, value=0x07))
track_1.append(Message('program_change', program=0))
track_1.append(Message('control_change', control=0x01, value=0x00))
track_1.append(Message('control_change', control=0x07, value=0x7F))
track_1.append(Message('control_change', control=0x0A, value=0x00))
track_1.append(Message('control_change', control=0x5B, value=0x00))
track_1.append(Message('control_change', control=0x5D, value=0x00))
track_1.append(Message('control_change', control=0x40, value=0x00))
track_1.append(Message('control_change', control=0x43, value=0x00))
track_1.append(Message('control_change', control=0x78, value=0x00))
track_1.append(Message('control_change', control=0x7B, value=0x00))
track_1.append(Message('control_change', control=0x7E, value=0x00))
track_1.append(Message('control_change', control=0x7F, value=0x00))
# Set the tempo for all three tracks
track_2.append(Message('control_change', control=0x51, value=0x07))
track_2.append(Message('program_change', program=0))
track_2.append(Message('control_change', control=0x01, value=0x00))
track_2.append(Message('control_change', control=0x07, value=0x7F))
track_2.append(Message('control_change', control=0x0A, value=0x00))
track_2.append(Message('control_change', control=0x5B, value=0x00))
track_2.append(Message('control_change', control=0x5D, value=0x00))
track_2.append(Message('control_change', control=0x40, value=0x00))
track_2.append(Message('control_change', control=0x43, value=0x00))
track_2.append(Message('control_change', control=0x78, value=0x00))
track_2.append(Message('control_change', control=0x7B, value=0x00))
track_2.append(Message('control_change', control=0x7F, value=0x00))
track_2.append(Message('control_change', control=0x7E, value=0x00))
# Set the tempo for all three tracks
track_3.append(Message('control_change', control=0x51, value=0x07))
track_3.append(Message('program_change', program=0))
track_3.append(Message('control_change', control=0x01, value=0x00))
track_3.append(Message('control_change', control=0x07, value=0x7F))
track_3.append(Message('control_change', control=0x0A, value=0x00))
track_3.append(Message('control_change', control=0x5B, value=0x00))
track_3.append(Message('control_change', control=0x5D, value=0x00))
track_3.append(Message('control_change', control=0x40, value=0x00))
track_3.append(Message('control_change', control=0x43, value=0x00))
track_3.append(Message('control_change', control=0x78, value=0x00))
track_3.append(Message('control_change', control=0x7B, value=0x00))
track_3.append(Message('control_change', control=0x7F, value=0x00))
track_3.append(Message('control_change', control=0x7E, value=0x00))
# Iterate through each dictionary and add each frequency as a note the corresponding track
# Primary sequence notes
for freq, duration in primary_frequency_tuples:
pitch = freq_to_midi_pitch(freq) # convert frequency to MIDI pitch
on = Message('note_on', note=pitch)
track_1.append(on)
#print(duration)
off = Message('note_off', note=pitch, time=duration)
track_1.append(off)
# Amino acid notes
for freq, duration in amino_frequency_tuples:
pitch = freq_to_midi_pitch(freq) # convert frequency to MIDI pitch
on = Message('note_on', note=pitch)
track_2.append(on)
#print(duration)
off = Message('note_off', note=pitch, time=duration)
track_2.append(off)
# Protein notes
for freq, duration in protein_frequency_dict.items():
pitch = freq_to_midi_pitch(freq) # convert frequency to MIDI pitch
on = Message('note_on', note=pitch)
track_3.append(on)
#print(duration)
off = Message('note_off', note=pitch, time=duration)
track_3.append(off)
# Save the MIDI file
new_string = str(filename).replace(", complete genome", "")
mid.save(f"Final_MIDI_Scores/{new_string}.mid")
return print("Done")