GNMIDI - MIDI Tools for Windows

36 Euro (Professional license) or 20 Euro (Light license) (incl. vat)
differences between Professional and Light license
Windows software
MIDI player, editor, converter, MIDI/MP3 karaoke editor, helpful tools
Did you know that GNMIDI can

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PDF Documentation
View End user license agreement
try the software free for 14 days, the end user license agreement must be accepted at program start.
single user, installation on up to 5 of your computers, 2 years free updates, the end user license agreement must be accepted at program start.
Windows systems:
The program is tested with Windows 7 and Windows 8 and Windows 10. It is not guaranteed to work fully with other Windows systems.
GNMIDI screenshot karaoke
Choose a melody MIDI channel with right mouse button to see the melody scores.

GNMIDI screenshot MIDI info  GNMIDI screenshot Mp3 info

GNMIDI screenshot with keyboard view


GNMIDI 3.29 released:
  • Added: show melody note hints in score lines below lyrics.
  • Added: cut measures option to MIDI cut/copy parts operation
  • Added: allow to add more melody channels in edit midi description (used in melody scores)
  • Improved: guess melody channel also by comparing notes and lyric positions
  • Improved: mute melody supports removing more melody channels
  • Improved: remove META events in cut part operation
  • Fixed: support psr meta basschord information in ascii text to MIDI conversion
  • Fixed: mp3 conversion to unsynchronized lyrics (USLT): text was cut
  • Fixed minor problem in fade dialog: sometimes last note was not faded
  • Fixed cut beat range: cut till end of beat
GNMIDI is a Karaoke MIDI song player, converter and MIDI editor.
It inserts and synchronises lyrics into MIDI and mp3 songs. It can modify different parameters of MIDI files (e.g. volume, sounds, tempo, controllers, channels, track titles, words...).
Custom batch operations
If you seek an operation specially for modifying your set of midi files please contact us. We can develop a batch application for your need so that you can safe much time doing it manually. GNMIDI 3 Professional contains a plugin concept to add new user operations to GNMIDI (without changing GNMIDI itself).