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MidiSwing is a midi sequencer. It lets you play, edit and create midi files.


  • Play midi files. Can use Java Sound, QuickTime instruments or Sound Fonts or play on an external device. The notes being played are indicated on a keyboard.
  • Edit midi files. The content of the midi files is displayed on a piano roll. You can change the notes and the major controls (tempo, instruments, volume, velocity, reverb, etc).
  • Create your own music. You can create your music from the piano roll or record from an external keyboard.
  • Monitor the midi events contained in the midi file
  • more...

What's New

Version 0.3.6b:
  • Bug fix: no more short notes when reading re-opening midi files.
  • Bug fix: now quantises notes consistently with the displayed grid.
  • Bug fix: no more unwanted automatic scrolling (hopefully).
  • Bug fix: lyrics with Japanese characters are now visible
  • Bug fix: the time signature is now properly displayed when it is changed.
  • Bug fix: the "Add more...


  • Mac OS X 10.4 or later
  • Java 5

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MidiSwing User Discussion

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Anonymous Member IconReview

Grâce à vous je commence à comprendre ce qu'est un fichier midi !

Reply0 replies
Version 0.2b
Anonymous Member IconReview

WOW, a free midi sequencer who look pretty, has great functionnalities and keep simple. I love it !!
Thank you a lot to the developper, i'm waiting this app for a long time :)

Reply0 replies
Version 0.2b
Anonymous Member IconReview

The interface is somewhat difficult to use, but functionality appears to be present in abundance.

For a 0.1 beta, this is quite a good app.

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Version 0.1b
Anonymous Member IconReview

Quite a nice little program. i haven't played with it much but my first impress is good. it appears to be written in java and is quite stable. it's hellishly simple though so don't expect to write the next symphony with it. however, i think this program's power may be in its shear simplicity.

i can't find any help for the program, even from the web site, at least not at this time. my advice, only use this program if you already have a good knowledge of MIDI - i mean, how channels, tracks and patches work. you must also know how to compose music.

the graphical reprasenation of the notes is pathetic. in future i would like the see the developers create a printable score layout from the notes you input. for now, the program is good for making .mid files that you can listen to eaily.

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Version 0.1b
There are no Ratings for this App yet.
> 4 4


Current Version (0.x)


Downloads 11,666
Version Downloads 3,169
License Free
Date 30 Sep 2007
Platform OS X / PPC 32 / Intel 32
Price Free
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