MIDI to CSV and CSV to MIDI Conversion

This repository contains Python scripts for converting MIDI files to CSV format and CSV files back to MIDI format. It utilizes the mido library for MIDI file handling.

TODO

• if the velocity is zero for everything, then don't create the file
• consider tokenization edits (see following section)
• find out why velocity is zero, if not set to 50 by default.
  • seems to have fixed in the last update

Tokenization

• quantize the velocity (normalize first)
• time
  • remove excess precision from time (remove just enough decimals so it sounds good)
  • remove the decimal of course (probably standardize to hundreths of a second)
  • put the time into a higher base to accelerate quantization
  • consider putting start time and duration
    • the duration will be the preprocessed difference of the start and end
    • really wish we could just train the network to know how to take the difference of the two times in high bases... might actualy be able to try this to see if the loss decreases...
• pitch
  • quantize the pitch into a higher base
  • base 12 so that it has automatic octaves (of course!)
    • this will preserve the octave content automatically!
  • Note: relative distance is ideal, but might depend on the tonic.
• Velocity
  • consider quantizing
• Pitch bend
  • consider removing the pitch_bend, or only using songs without this

Requirements

To run the scripts, you need to have the following dependencies installed:

• mido==1.3.0
• csv (built-in module)

You can install the required dependencies using pip:

pip install -r requirements.txt

Usage

MIDI to CSV Conversion

To convert a MIDI file to CSV format, use the to_csv.py script.

Provide the path to the input MIDI file and the desired output CSV file as arguments.

For example:

python to_csv.py -m input.mid -c output.csv

If no -c is specified, then the output file will be named input.mid.csv.

CSV to MIDI Conversion

To convert a CSV file back to MIDI format, use the to_midi.py script.

Provide the path to the input CSV file and the desired output MIDI file as arguments.

For example:

python to_midi.py -c input.csv -m output.mid

If no -m is specified, then the output file will be named input.csv.mid.

You can also specify an optional tempo file using the -t argument.

Make sure to adjust the script if you have specific MIDI settings or pitch bend data.

License

This project is licensed under the Apache-2.0 License. See the LICENSE file for details.