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midi_print2.py
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midi_print2.py
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# Updated to output beats not seconds (assumes 1 beat = 1 quarter note)
import mido
import sys
def midi_note_to_freq(note_number):
""" Convert MIDI note number to frequency in Hz. """
return 440 * 2 ** ((note_number - 69) / 12)
# Check if a filename argument was provided
if len(sys.argv) < 2:
print("Usage: python script_name.py path_to_your_midi_file.mid")
sys.exit(1)
midi_file_path = sys.argv[1]
midi_file = mido.MidiFile(midi_file_path)
note_gain = {} # Dictionary to store gain (velocity) for each note number
for track in midi_file.tracks:
current_time_in_ticks = 0 # Current time in ticks
for msg in track:
current_time_in_ticks += msg.time # Increment time by delta time of the message
if msg.type == 'note_on':
time_in_beats = current_time_in_ticks / midi_file.ticks_per_beat
freq = midi_note_to_freq(msg.note)
gain = msg.velocity / 127 # Normalizing velocity to a 0-1 range (Gain)
note_gain[msg.note] = gain # Store the gain for this note number
start_time_in_beats = time_in_beats
elif msg.type == 'note_off' or (msg.type == 'note_on' and msg.velocity == 0):
end_time_in_beats = current_time_in_ticks / midi_file.ticks_per_beat
gain = note_gain.get(msg.note, 0) # Retrieve the stored gain for this note number
if gain > 0: # Only print if there was a valid note_on for this note
print(f"\\operatorname{{tone}}\\left({freq:.2f},{gain:.2f}\\right)\\left\\{{{start_time_in_beats}<t<{end_time_in_beats}+k_{{1}}\\right\\}}")