GNMIDIv2.15

The program can change files (or whole directories and their sub-directories) back and forth between MIDI format 0 and 1. It can repair corrupt MIDI files, convert from RMI to MIDI, and generate MIDI medley. GNMIDI can change the volume of a MIDI file for certain channel or for all channels, easily fading sections in or out. Copying between units or beats, exporting parts to a new file, and trimming the mute end of a MIDI song are all simple tasks.

GNMIDI can translate Karaoke files (KAR) to MIDI with lyrics intact, and vice versa. It lets you edit track titles, and can export MIDI information (including lyrics) to a text file or to the Windows Clipboard. In fact, it can even convert a MIDI file to ASCII text that you can edit with a word processor and then convert back to MIDI.

A MIDI "humanize" feature lets you put small timing or key-pressure variations into a song to make it feel less mechanical. You can also split programs to generate a track for each used instrument and separate their notes, or split drum instruments (drum notes at channel 10) to generate a track for each used drum instrument.

GNMIDI allows you to check the natural note ranges of standard instruments, modify note velocity, stretch note duration, transpose the notes of specified channels by half notes, and use note translations tables to replace notes (and optionally their channel number). It can calculate maximum note polyphony, find and remove hanging notes, and can even guess chords and add them as synchronized text events.

If you have ever noticed random side effects when playing MIDI files in sequence, GNMIDI solves this problem by issuing sysex device-reset commands and initializing missing MIDI parameters. With GNMIDI, you can set the tempo (BPM) of a MIDI song, change its resolution (PPQ), reverse it for backwards play, or add a secret copyright notice. The program is able to compress most MIDI files from 10% to 15%, and the result remains standard MIDI.