GNMIDI Professional 3.42 MIDI Tools for Windows

GNMIDI is a Karaoke MIDI song player, converter and MIDI editor.
It inserts and synchronises lyrics and chords into MIDI and mp3 songs and can analyse, modify, convert MIDI files by many operations.
GNMIDI can solve many MIDI tasks for you.
Please use the contact form to get advice how your task can be done with GNMIDI.
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

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, 5 installations on your own 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 and Windows 11. When S-Mode is active in Windows Home then Windows does not allow to install or start application. It is not guaranteed to work fully with other Windows systems.


-40% coupon code: SALE40 (also for GNMIDI bundle products and products GNMixer and GNMIDFMT and GNInsertController).
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 karaoke and keyboard view


New media converter released: gnmediahelper


GNMIDI 3.42 released:
  • added: new operation merge lyric tracks (also batch)
  • improved: added option channels to MIDI humanize dialog
  • improved: added mp3 operations again (were disabled in 3.41)
  • fixed: when modifying text in karaoke editor then those lyric events were moved to track 1 (format 1 MIDI files only)
  • fixed: when dialog choose midi output was cancelled by user then no MIDI device was used (no sound)
  • fixed: dialogs find/modify midi events by script disabled cancel button when no text entered


New product available: Programming MIDI files by script toolgnmidiscript
  • Mighty high level programming lanuage (no unreadable postfix coding)
  • gnmidiscript: program, test, debug, profile your script
  • gnscript: try script language with gnscript interpreter and many examples
  • toolgnmidiscript: add new tools to GNMIDI Professional menu
  • toolgnmidiscript: modify MIDI files, convert MIDI to csv, analyse MIDI folder
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).

Frequently Asked Questions (FAQ)


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