APS MIDI Prep Tool is a desktop tool for editing MIDI track titles with legacy playback systems in mind. Current version: 0.4.0 (2026).

Built for the workflows at AlexanderPeppe.com, this project helps players, technicians, and collectors keep MIDI files named properly and compatible with older Disklavier setups.

Many older systems are sensitive to modern filenames and metadata. This app focuses on practical compatibility tasks:

• Edit MIDI titles quickly in bulk
• Keep track names safer for older hardware
• Rename files to DOS 8.3 format when needed
• Create backups before making changes
• Leaving XG data intact

• Load all .mid / .midi files from a folder
• Drag and drop MIDI files into the table
• Click titles to edit and queue changes
• Optional warning for titles longer than 32 characters
• Save updates directly to source files
• Save As... to write updated copies to another folder
• One-click Rename All to DOS 8.3
• Optional backup files (*_backup.mid) before changes

For older Disklavier and floppy-disk style workflows, these practices are usually safest:

• Use short titles
• Prefer printable ASCII characters
• Use DOS 8.3 filenames when exchanging files with legacy media or software
• Keep backups before large renaming operations

This app includes tools for all of the above.

• Python 3.10+
• PySide6

python3 -m venv .venv
source .venv/bin/activate
pip install PySide6
python3 aps_midi_prep_tool.py

1. Launch the app.
2. Click Choose MIDI Folder.
3. Review file names and extracted titles.
4. Click the Title column to edit entries.
5. Use Save to write changes, or Save As... for copies.
6. Use Rename All to DOS 8.3 when targeting legacy systems.

• Main site: alexanderpeppe.com

This is an independent utility created for real-world piano service workflows and legacy compatibility. Test on copies first when working with important archives.