MIDIopsy

MIDIopsy is a Windows application (written in C#) that is used to view, play, and edit the binary contents of standard MIDI (musical instrument digital interface) files. It is free, open-source software (FOSS), distributed under the MIT License. (In a nutshell, you can do whatever you want with it, so long as it retains the copyright notice.)

The only requirement for MIDIopsy is .NET Framework 3.0 (or higher). If you have Windows Vista or later, you already meet this requirement. Otherwise, check to see which versions of .NET Framework are installed. If you do not already have it, download and install .NET Framework version 3.0 (or higher) before running MIDIopsy.

• Download the latest release (current version is 1.2)
  What's new:
  • Cut, Copy, & Paste commands (under Edit Item)
  • Go To command (under Navigation)
  • Configurable text wrapping (under Settings)
  • MIDI Reference section in Help
  • Streamlined user interface
  • Single selection mode enforced
• Download previous releases
  • Version 1.1
    • Dual text boxes replaced with list view
    • Total (cumulative) event times calculated
    • Track lengths updated automatically
    • Notation based on running channel and key signature
    • Safe loading of files with errors
    • Logging (under Settings)
    • More verbose sample MIDI files
  • Version 1.0

• User Documentation (Help file that ships with the application)

• GitHub repository (get source code, report bugs, request enhancements, or otherwise become involved)