Graphical MIDI Tools 2.0 adds a piano roll view window to Sibelius®, allowing you to insert custom automation curves, modify note velocities, or change the sound position and duration of notes.

With the new Phantom Notes module, you can insert MIDI command notes that will sound on playback, but do not affect the written score.

Create more realistic mockups within Sibelius:

  • Adjust the start and duration of a note's sound
  • Draw your own CC automation curves (volume, expression, pitch bend, etc)
  • Add hidden notes that do not affect the written score (great for key switches!)
  • See feature list...

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With GMT, you can fine-tune the start position and duration of each note in your music.

These changes will only affect the playback, and NOT the written score, allowing you to polish your MIDI mockup to your needs.

Draw MIDI automation curves for any controller

Take your MIDI mockups to the next level by inserting your own custom MIDI CC (Continuous Controllers) or pitch bend atomation curves.

All with your mouse in an easy, graphical way!

Edit Note velocities in a graphical way

Get the exact dynamics values your passage needs based on your favourite library.

With GMT you can indicate which velocity you want a note to have, or leave the velocity unset to let the playback engine decide.

New! Hidden "phantom" notes / key switches module

With the new "phantom" notes module, you can insert and edit MIDI hidden notes which are only performed by the playback engine (via MIDI commands), and do not affect written score at all.

This allows you to recreate performances whenever notation is not 100% explicit, like for example on a harp glissando indication.

"Phantom" notes are also great for triggering key switches, if your library supports them.


Q: Are MIDI edits preserved when exporting the score as a MIDI file?

A: Yes! One of the great advantages of GMT is that all your edits (automation curves, velocities, hidden notes, etc.) are stored in the MIDI export file. Should you want to continue your workflow in a sequencer/DAW, all of your MIDI edits will be imported as well."


Q: If I open my score in a friend's computer without GMT, will my MIDI edits be present?

A: Yes! GMT stores all your edits as text commands above the staff, or as note properties. These are saved within the Sibelius file. If you open your score on a computer without GMT, Sibelius will still play all of your edits, but you will not be able to edit them in the graphical manner that GMT offers.


Q: Does it work with NotePerfomer?

A: Yes!. Not only does it work with it, but it complements it perfectly. NotePerfomer's artificial intelligence will decide how to play your score with outstanding results in the great majority of cases.

Every now and then, when you might want to manually adjust certain MIDI parameters, or draw a custom automation curve, or even add hidden notes is where GMT comes in: to help you polish your mockup and get great sounding results."

To see examples of GMT and NotePerformer working together, we invite you to visit our official youtube channel.


Valid for educators and institutions, important discounts apply in classroom multi-seat licenses. Proof of academic eligibility is required.

If you are interested in acquiring an educational multi-seat license for your lab please contact us at

Go to the GMT for Education Page


  • Sibelius 7.5 (2018) onward. We recommend using the latest Sibelius version (Ultimate)
  • Windows 10 or higher.
  • MacOS 10.6 or higher. Note:: Monterey is fully supported.
  • Notice: Not compatible with Sibelius First (since it does not allow the plugin installation)
In any case, we highly recommend testing GMT on your system via our free trial to ensure compatibility before you proceed with your purchase.