Medussa MIDI
Piano Visualizer & MIDI Editor
Only for Mac
$29.99
Mac
Watch your music come to life on an 88-key piano. Practice, record and refine your performance in the piano roll, then share it as a 4K video.
Medussa brings piano visualization, practice, MIDI editing and video creation together in one native macOS app. See your music, refine your performance and share it — all within one project.
SEE YOUR PERFORMANCE
Play a connected MIDI keyboard or open a MIDI file and watch the notes fall onto a full 88-key piano. Separate colors for each hand make the music easy to follow. Medussa assigns notes to each hand on import, and you can adjust those assignments later.
Make the visualization your own with colors, glow, particles, Plexus connections, water waves, backgrounds and floor effects. Adjust note transparency by velocity and customize the live chord display's position, margins, font and weight. Choose from 12 appearance profiles, or save presets for individual layers.
PRACTICE WITH FEEDBACK
Practice with the metronome, build routines with progressively increasing tempos, or follow a MIDI file with guide notes and hit detection. Set a count-in, pause between blocks to review your progress, and choose the accuracy required for a round to count as complete.
Review your session history, practice duration, tempo progress and results for each block. Export a PDF report or a square image to share.
RECORD AND EDIT MIDI
Record in the Visualizer or Editor, then refine your take in the piano roll. Edit note pitch and duration, velocity, sustain pedal, continuous MIDI controllers, pitch bend, tempo, time signatures, key changes, markers and chords. Quantize with swing, humanize your performance, extract a groove from one passage and apply it to another, insert or delete bars, and undo each edit.
Import a WAV, AIFF or MP3 file to play along with. Trim both ends, shape fade-in and fade-out with four curve types, adjust its level with a channel fader and peak meter, or mute and solo it alongside your instrument.
EXPLORE THE HARMONY
Detect chords, inversions and slash chords, then create a chord chart organized by bar. Set the chart's written key, transpose it and export a printable PDF chord chart.
CREATE AND SHARE VIDEO
Render offline at 720p, 1080p or 4K, with frame rates of 30, 60 or 120 fps. Create landscape, square or vertical videos using H.264 or HEVC in MP4, or ProRes in MOV. Export with a transparent background using ProRes 4444 or HEVC with alpha for compositing.
For square and vertical videos, position the camera frame, let it follow the music or animate it with camera points. Export camera motion for After Effects, Final Cut Pro or DaVinci Resolve, or as CSV or JSON.
Include audio in your video or export it separately as WAV.
BUILD YOUR OWN SAMPLE INSTRUMENT
Medussa is also a sampler. Drop WAV or FLAC samples onto the mapping grid. Medussa reads pitch and velocity information from their filenames to map them across the 88 keys. Adjust zones and velocity layers, shape the ADSR envelope, set the level and save your custom instrument file. Octave and semitone transposition changes the MIDI notes, so each note triggers its corresponding sample.
Each instrument has its own effects chain: a four-band parametric EQ with a live spectrum analyzer; stereo delay set in milliseconds or synced to the project tempo as note values, with ping-pong cross-feed, feedback and filters; room, hall or plate reverb with pre-delay, damping, diffusion and width; and tape machine emulation with saturation drive, wow, flutter, age and hiss controls.
BUILT FOR MUSICIANS
Use separate instruments for your performance and guide notes. Open the built-in manual in any of the five supported languages.
Your projects stay on your Mac. No account, cloud service or internet connection is required.
• Runs natively on Apple Silicon and Intel Macs
• Requires macOS 13 Ventura or later
• Available in English, Spanish, Portuguese, Japanese and Korean
See your music. Shape every detail.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Chord display
• Customize side and top/bottom margins when the chord display is not centered.
• Choose from 24 new fonts and font weights from Light to Heavy.
• Exported videos preserve the chord position, margins, font and weight shown on screen.
Windows and panels
• Floating panels respond to the first click. The space bar starts and stops playback even when a panel is in front.
• Panels no longer move with the main window. They stay above Medussa and remain visible when you switch to another app.
• A new option in Settings > Global lets you bring panels back to Medussa's screen or keep them on the screen where you placed them.
Instrument
• Octave and Tune now transpose MIDI notes, so each note triggers its corresponding sample instead of changing another sample's pitch. A4 continues to adjust the instrument's fine tuning.
Piano roll
• Velocity indicators move with notes as you drag them.
• Hold Shift while dragging to constrain movement to one axis.
• Click an empty area of the note grid to move the playhead to that position.
Visualizer and video
• Glow and particle highlights scale consistently across export resolutions, including 4K.
• The chord display editor previews changes to color, font, size and shadow as you make them.
• Recording with the vertical camera frame no longer causes lag, and the frame stays fixed during recording.
• The camera frame's "keys" label is now centered.
Fixes
• The camera frame's "Follow the music automatically (beta)" option can be enabled again.
• Importing a MIDI file preserves the existing audio track in the Visualizer and Editor. It replaces the MIDI content and clears previous recordings, chords and key information.
• Changing particle colors no longer changes water wave colors.
• Choosing a floor image from your Mac no longer freezes Settings.
• The MIDI source list refreshes automatically when you open Settings.
The developer, Grey Buffalo Studios, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Cristian Villagra
- Size
- 70.8 MB
- Category
- Music
- Compatibility
Requires macOS 13.0 or later.
- Mac
Requires macOS 13.0 or later.
- Mac
- Languages
English and 4 more
- English, Japanese, Korean, Portuguese, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 Cristián R. Villagra

