Life & fun · November 24, 2025
Cynthia – Reliably play MIDI music files – MIT / Portable / Windows
Easy to use, portable app to play midi music files on all flavours of Microsoft Windows. Brief Background - Used midi playback way back in the days of Windows 95 for some fun and entertaining apps, but as Windows progressed, it seemed their midi support (for Win32 anyway) regressed in both startup speed and reliability. Midi playback used to be near instant on Windows 95, but on later versions of Windows this was delayed to about 5-7 seconds. And reliability became somewhat patchy. This made working with midi a real headache. Cynthia was built to test and enjoy midi music once again. It's…
In plain words
Cynthia is a portable MIDI music player for Windows that addresses performance issues with the operating system's native MIDI support. The application launches quickly and plays MIDI files reliably across all Windows versions, solving the delayed startup and inconsistent playback problems that plague modern Windows systems. It includes 25 sample MIDI files pre-loaded and requires no installation, making it accessible for anyone wanting to play MIDI music without compatibility headaches.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Easy to use, portable app to play midi music files on all flavours of Microsoft Windows. Brief Background - Used midi playback way back in the days of Windows 95 for some fun and entertaining apps, but as Windows progressed, it seemed their midi support (for Win32 anyway) regressed in both startup speed and reliability. Midi playback used to be near instant on Windows 95, but on later versions of Windows this was delayed to about 5-7 seconds. And reliability became somewhat patchy. This made working with midi a real headache. Cynthia was built to test and enjoy midi music once again. It's taken over a year of solid coding, recoding, testing, re-testing, and a lot more testing, and some hair pulling along the way, but finally Cynthia works pretty solidly on Windows now. Some of Cynthia's Key Features: * 25 built-in sample midis on a virtual disk - play right out-of-the box * Play Modes: Once, Repeat One, Repeat All, All Once, Random * Play ".mid", ".midi" and ".rmi" midi files in 0 and 1 formats * Realtime track data indicators, channel output volume indicators with peak hold, 128 note usage indicators * Volume Bars to display realtime average volume and bass volume levels * Use an Xbox Controller to control Cynthia's main functions * Large list capacity for handling thousands of midi files * Switch between up to 10 midi playback devices in realtime * Playback through a single midi device, or multiple simultaneous midi devices with lag and channel output support * Custom built midi playback engine for high playback stability * Custom built codebase for low-level work to GUI level * Also runs on Linux/Mac (including apple silicon) via Wine * Smart Source Code - compiles in Borland Delphi 3 and Lazarus 2 * MIT License YouTube Video of Cynthia playing a midi: https://youtu.be/IDEOQUboTvQ GitHub Repo: https://github.com/blaiz2023/Cynthia
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