Reliably play midi music files from a folder or ".m3u" play list

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%)

  • 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)

  • 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

  • Automatic compact mode for display on small/low resolution screens

  • Options Window - Easily change app color, font, and settings

  • Portable

  • MIT License

 0/6

App specs

  • License

    Free

  • Version

    1.0.6062

  • Latest update

  • Platform

    Windows

  • OS

    Windows 8

  • Language

    English

  • Downloads

    48

    Last month's downloads

    • 7
  • Size

    1.99 MB

  • Developer


Icon of program: Cynthia

Cynthia for PC

  • Free
  • 4.9
    1
  • 48
  • V1.0.6062

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Softonic

Is Cynthia safe?

100/100

Score result: Clean

This file passed a comprehensive security scan using VirusTotal technology. It is safe to download.

  • Virus free
  • Spyware free
  • Malware free
  • Verified by Security Partners

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Scan Info

Last scan
Wednesday, December 10, 2025
Scan provider
VirusTotal · Full report

File Integrity

File
cynthia.exe
SHA256
8b9cab404e174767144c13a32c7357fdf320ea6d632069e68afc10f107f98f38
SHA1
9ad0f51ed878fd685c7e9534128ab9fdd3d56d68

Softonic security commitment

Cynthia has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware. For more information, visit our Security and Trust Center