See the music you play
Medussa is a MIDI piano visualizer for Mac. It turns your playing into light: practice a piece bar by bar, record and edit your take, and export it as a video up to 4K.
A MIDI piano visualizer: every note, in light
Play live from your piano or open any MIDI file. Notes fall onto an 88-key piano keyboard and open into particles, curves and water waves, with the left and right hand each in their own color. Start from one of twelve appearance profiles, save your own presets, and put an image or a video behind it all.
Piano practice, bar by bar
Guided training splits a piece into blocks, each with its own tempo and number of repetitions. Medussa listens as you play, shows how many notes you hit and can move on only when you have earned it. For technique, metronome blocks raise the tempo step by step — and every session is kept in your practice history.
Record MIDI, then edit it in a piano roll
Record straight from your piano, even lap after lap of a loop, and shape the take in a full piano roll: notes, hands, velocity, pedal and any MIDI control. Quantize MIDI with swing and groove only where you want the grid, build the tempo map after playing freely, and line it all up with a reference audio track.
From notes to chord chart
See the name of each chord as it sounds, generate a first harmony from the notes and turn it into a clean chord chart or lead sheet. Transpose it, keep it in your library and export it as a PDF, ready to print or send to the band.
A grand piano sampler, built in
Medussa comes with its own sample instrument, a re-sampled grand piano. Shape its volume, tuning and envelope, add EQ, delay, reverb and tape, or load your Audio Unit instruments — with a separate sound for the practice guide.
Sample mapping
- Create, duplicate and move zones
- A custom envelope for each zone
- Save it as your own instrument
Effects
- 4-band EQ with analyzer
- Delay, reverb and tape saturation
- Quality and RAM or streaming modes
Export your piano as 4K video
Export the whole piece or just a few bars, up to 4K at 30, 60 or 120 frames per second, in 16:9, 9:16 or 1:1. In vertical formats the camera can follow the music on its own or move exactly where you tell it. Transparent video, WAV and MIDI are there when you need to keep working in another app.
Start without a piano
Medussa includes two pieces ready to play — Bach’s Prelude in C major and Clementi’s Sonatina Op. 36 No. 3 — with hands split and training plans set up. Open File › Sample Sessions and press play.
Frequently asked questions
- What is Medussa?
- Medussa is a MIDI piano visualizer for Mac. You play live from a MIDI keyboard or open a MIDI file, and the notes fall onto an 88-key keyboard and turn into particles, curves and water waves. It also has guided practice, a piano roll editor, chord charts and video export.
- Do I need a MIDI keyboard or piano?
- No. Medussa works with any MIDI keyboard or piano, but you can also open MIDI files or start from the two sample sessions that come with the app.
- Can I turn a MIDI file into a video?
- Yes. Open the MIDI file, choose an appearance and export it as MP4 up to 4K at 30, 60 or 120 frames per second, in 16:9, 9:16 or 1:1. MOV with transparency is also available.
- Can I record and edit my playing?
- Yes. Record from your piano, then edit notes, hands, velocity, pedal and other MIDI controls in a full piano roll. You can quantize with swing and groove, and export the result as MIDI or WAV.
- Does it make chord charts?
- Yes. Medussa shows the chord names as you play, generates a first harmony from the notes and turns it into a chord chart you can transpose and export as PDF.
- What do I need to run it, and how much does it cost?
- Medussa runs on macOS 13 Ventura or later. It is available on the Mac App Store for USD 29.99.
Specs
- System
- macOS 13 Ventura or later
- Input
- Any MIDI keyboard or piano — or none at all
- Languages
- English, Spanish, Portuguese, Japanese and Korean
- Opens
- MIDI, WAV, AIFF and MP3
- Exports
- MP4, MOV with transparency, WAV, MIDI and PDF