Reliably play midi music files from a folder or ".m3u" play list. Adjust playback speed, volume and output device on-the-fly during playback. A large playback progress bar makes jumping forward and backward in time a breeze with just a single click or tap. Supports ".mid", ".midi" and ".rmi" files in format 0 (single track) and format 1 (multi-track). Comes complete with 25 sample midis ready to play.





Features

• Dual play systems - Play Folder and Play List
  
• Comes with 25 built-in sample midis on a virtual disk
  
• Elapsed, Remaining and Total time readouts
  
• Device Status, Device Count, Msgs/sec and Data Rate readouts
  
• Native ".m3u" playlist support (copy, paste, open, save, build)
  
• Drag and drop midi files to play/add to playlist
  
• Play Modes: Once, Repeat One, Repeat All, All Once, Random
  
• Standard Play Speed Range: 50% to 200% (0.5x to 2x)
  
• Extended Play Speed Range: 10% to 1,000% (0.1x to 10x)
  
• Intro Mode: Play first 2s, 5s, 10s or 30s of midi
  
• Rewind/Fast Forward by: 1s, 2s, 5s, 10s or 30s
  
• Play on Start option - playback commences on app start
  
• Always on Midi option - maintain connection to midi device(s) for instant playback
  
• Auto Fade In - eliminate loud or abrupt notes during rewind, fast forward or reposition operations
  
• Playback Progress bar - click to reposition/jump backward or forward in time
  
• Volume control with volume boost (up to 200%)
  
• " Mixer" link - display Windows "Volume Mixer" app
  
• Play ".mid", ".midi" and ".rmi" midi files in 0 and 1 formats
  
• Scrolling lyrics viewer
  
• Detailed midi information panel
  
• Tracks Panel: Realtime track data indicators, display flat or shaded, with mute all, unmute all, and mute individual track options
  
• Channels Panel: Realtime channel output volume indicators with peak level hold and variable hold time, display flat or shaded, unmute all, mute all, and mute individual channel options
  
• Mixer: Adjust individual channel volume levels from 0% to 200%
  
• Option: Number channels 0-15 or 1-16
  
• Notes Panel: 128 realtime note usage indicators with variable hold time, 8-12 notes per line, labels as letters or numbers, display flat or shaded, unmute all, mute all, and mute individual note options
  
• Option: Number notes 0-127 or 1-128
  
• Piano Panel: View realtime piano keystrokes on a 128, 88, 76, 61, 54, 49 or 37 key keyboard
  
• Piano Keystroke Illumination: Off, Flat, Shade Up, Shade Down, Subtle, Subtle 2, Leading Edge, and Leading Edge 2
  
• Piano: Mark middle C key, C + F keys, or all white keys
  
• Volume Bars: Realtime average volume and bass volume levels (left and right vertical)
  
• Transpose option: Shift all notes up/down music scale
  
• Option: Peak Render Rate: 10, 20, 30 (default), 60 or 100fps
  
• Use an Xbox Controller to control Cynthia's main functions: Playback speed, volume, song position, display panels, song file navigation, jump to start of song, toggle fullscreen mode, etc
  
• Large list capacity for handling thousands of midi files
  
• Switch between up to 10 midi playback devices
  
• Supports playback through a single midi device, or multiple simultaneous midi devices
  
• Multi-Device Options (per midi device): Time Shift - adjust playback timing to compensate for midi device lag from -500 ms to +500 ms, Device Volume - adjust output volume from 0% to 200%, Output Channels - select which midi channels to play through the device
  
• Automatic Midi Device(s) Resync - detects OS changes in midi device ordering/names and corrects in realtime
  
• Custom built midi playback engine for high playback stability
  
• Simple and easy to use
  
• Options Window - Easily change app color, font, and settings
  
• Portable
  
• Smart Source Code (Borland Delphi 3 and Lazarus 2.2/4.4/4.6)
  

App Changes

• Start playback at beginning of midi for "Once" and "All Once" options if previously finished playing
  
• Updated codebase
  

Codebase Changes

• Optimised for 2K display (60fps+)
  
• Functional on 4K display
  
• General render improvements of ~300%
  
• Text render improvements of ~200%
  
• Smart font character caching with twin feather support
  
• Increased background animation render rate to 60fps
  
• Active GUI Scaling (60% - 200% of OS scaling, realtime adaptive)
  
• TextCore (upgraded) - non-GUI and GUI text box engine (txt, bwd, bwp, rtf)
  
• FastDraw (new) - GUI / general graphics work via high-level and low-level rapid-render procs for the CPU
  
• Dynamic scaling and loading of System, Folder, and App images
  
• New color-based animated background schemes / engine upgrade
  
• Automatic MSIX handling (MS Store app/MSIX bundle) with seamless adaptive settings and temp file storage and management for restrictive access compliance
  
• Source code supports both 32bit and 64bit
  
• 32bit compilation in Borland Delphi 3 (stable)
  
• 32bit compilation in Lazarus 2.2 (stable)
  
• 64bit compilation in Lazarus 4.4+ (functional/work in progress)

Information

Downloads

Images

Reference

• What makes a portable app special?
• MIT License

What makes a portable app special?A portable app is a big leap forward for apps in general.  A standard or traditionally engineered app requires a lot of support in the form of libraries, data files, images, scripts, etc and the list goes on.  You get the picture.  Some portable apps out there still include this bundle of bits, they merely offload it into a local folder.  A dump of goodies of sorts.

We tend to see a portable app in quite a different light.  Our vision of a portable app is designed tight, clean, free of bloat, and all data where possible is included directly within, structured right into the fabric of the app itself, and designed from the bare-metal up if required.

Though the most important difference between a traditional app and a portable app is that a portable app will not install on your computer.  This is extremely important as the installation process is often messy, and can clutter up your computer by dumping a lot of stuff all over the Windows file structure and registry, and over time may slow down and decrease the overall performance of your computer.

A portable app will not do this, which keeps your computer clean and running smooth and fast as it should.  Unfortunately most software is not designed with portable in mind.  They're more akin to a large leaky box of bits than tight engineering.  And because a portable app is not installed on your computer, it runs outside the normal scope of the operating system, and is not locked down or tied to it.  And thus can be moved about, from disk to disk, or computer to computer.

Typically a portable app will reside on a USB pen stick, removable media, or in a special folder on a portable hard disk.  This makes it easy to take from one computer to the next, and use over and over.  An immensely valuable freedom, and something an installed app can only dream of.

But a serious technical hurdle must be overcome for a truly portable app to be free.  And that is the humble setting.  Yes, a portable app must be able to handle it's settings on it's own.  It must be able to read them from disk, filter them, check and correct them where required, and write them back to disk.  All without the help of the Windows' registry or other operating system dependent structures.

An installed app typically can't or won't do this.  Instead, it relies on Windows and the registry to manage it's settings and other important data sets for it.  It therefore takes a higher degree of technical competence to escape this "tied to the operating system" situation.

Here is our current standard for a portable app:

• Require no installation or setup
  
• Require no additional DLL libraries to run and perform it's core function
  
• Make no alteration to the host operating system, or its settings, files, libraries or core functions, or the Windows registry, unless it forms a part or a whole of the app's core function, and then, only when initiated by the user
  
• Be able to run "out of the box"
  
• Require no compiling, conversion, installation or setup of support structures in order to execute, except for when such an environment constitutes an execution enabling environment, such as a command translation service like Wine
  
• Be free of zipped or otherwise externally bundled blob structures containing folders, files and bits
  
• Operate on less powerful hardware to facilitate operation on a broad spectrum of computers
  
• Less demanding API landscape to facilitate execution on a broad range of operating systems and software translation environments
  
• Require no special software libraries be present in order to run, such as .NET or JAVA, unless typically pre-installed on the target operating system or execution environment
  
• Not require an internet connection to run, unless the connection is required to fulfill the app's core function, such as a web server
  
• Require no downloads, addons, or registration in order to run
  
• Provide help and documentation offline via a built-in viewer, or by limited external means, such as Notepad
  
• Be self-contained with all necessary files, data sets, and samples stored within it's internal structure, such that access be provided preferably through direct enabling mechanisms
  
• Store, hold and manage external app settings and user data in a local sub-folder, and that sub-folder be easily identifiable as belonging to the app
  
• Provide a mostly consistent appearance and experience to the user across the widest possible range of operating systems and execution environments
  
• Value backwards compatibility, and be able to actively make use of that older hardware and software
  
• Possess a compact, bloat-free footprint
  

⏶MIT LicenseCopyright 2026 Blaiz Enterprises ( www.blaizenterprises.com )

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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