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MIDI sequencer / editor software "Sekaiju"

A screenshot of Sekaiju, free and open source MIDI sequencer software.

"Sekaiju" is free, open source MIDI sequencer / editor software for creating and editing MIDI data. You can record MIDI keyboard or synthesizer's playing to the computer, and you can compose music to play with your MIDI modules or synthesizers. Since it allows to edit all kind of event, and has unlimited undo and redo feature, Sekaiju also can be used as a powerful MIDI editor. A real-time input feature which can input each MIDI channel messages into spearated tracks at the same time is received well. Since Sekaiju5.1, an external extension program SAL (Sekaiju Application Language) which enables you to make user-defined editing feature is supported.

■Example music created by using "Sekaiju" MIDI sequencer (MP3 format, Composer : kuzu)

Please note:

Sekaiju is made in Japan, therefore default GUI language is Japanese. Here shows two way to change to English.

(a) Select "Setup" - "Language" from the menu and select "English" in the language dialog, and restart Sekaiju. If the menu gets character corruption, press [Alt]+[S] and then [Alt]+[L], and you'll open the dialog.

(b) Open "Sekaiju.ini" in your text editor, change "UserInterface=Japanese" to "UserInterface=English", and then save it, and then execute Sekaiju.exe

Name OS FileName Release day Size
■Sekaiju5.2 Windows XP / Vista / 7 / 8.1 / 10 Sekaiju5.2.zip 2018/02/25 18.1MB
■Sekaiju5.1 Windows XP / Vista / 7 / 8.1 / 10 Sekaiju5.1.zip 2017/12/03 18.1MB
■Sekaiju5.0 Windows XP / Vista / 7 / 8.1 / 10 Sekaiju5.0.zip 2017/05/28 18.1MB
■Sekaiju4.9 Windows XP / Vista / 7 / 8.1 / 10 Sekaiju4.9.zip 2016/12/04 18.1MB
■Sekaiju4.8 Windows XP / Vista / 7 / 8.1 / 10 Sekaiju4.8.zip 2016/05/08 18.1MB
■Sekaiju4.7 Windows XP / Vista / 7 / 8.1 / 10 Sekaiju4.7.zip 2016/04/17 18.1MB
■Sekaiju4.6 Windows XP / Vista / 7 / 8.1 Sekaiju4.6.zip 2016/01/17 18.1MB
■Sekaiju4.5 Windows XP / Vista / 7 / 8.1 Sekaiju4.5.zip 2015/05/04 18.1MB
■Sekaiju4.4 Windows XP / Vista / 7 / 8.1 Sekaiju4.4.zip 2015/01/25 18.1MB
■Sekaiju4.3 Windows XP / Vista / 7 / 8.1 Sekaiju4.3.zip 2014/11/23 13.7MB
■Sekaiju4.2 Windows XP / Vista / 7 / 8.1 Sekaiju4.2.zip 2014/09/07 13.7MB
■Sekaiju4.1 Windows XP / Vista / 7 / 8.1 Sekaiju4.1.zip 2014/06/08 13.7MB
■Sekaiju4.0 Windows XP / Vista / 7 / 8.1 Sekaiju4.0.zip 2014/05/25 13.7MB
■Sekaiju3.9 Windows XP / Vista / 7/ 8.1 Sekaiju3.9.zip 2013/11/19 13.4MB
■Sekaiju3.8 Windows XP / Vista / 7 / 8.1 Sekaiju3.8.zip 2013/11/10 13.4MB
■Sekaiju3.7 Windows XP / Vista / 7 / 8.1 Sekaiju3.7.zip 2013/09/16 12.6MB
■Sekaiju3.6 Windows 2000 / XP / Vista / 7 Sekaiju3.6.zip 2013/05/05 6.28MB
■Sekaiju3.5 Windows 2000 / XP / Vista / 7 Sekaiju3.5.zip 2013/03/03 6.14MB
■Sekaiju3.4 Windows 2000 / XP / Vista / 7 Sekaiju3.4.zip 2012/12/02 6.02MB
■Sekaiju3.3 Windows 2000 / XP / Vista / 7 Sekaiju3.3.zip 2012/09/30 5.94MB
■Sekaiju3.2 Windows 2000 / XP / Vista / 7 Sekaiju3.2.zip 2012/08/19 5.94MB
■Sekaiju3.1 Windows 2000 / XP / Vista / 7 Sekaiju3.1.zip 2012/07/07 5.92MB
■Sekaiju3.0 Windows 2000 / XP / Vista / 7 Sekaiju3.0.zip 2012/04/22 5.92MB
■Sekaiju2.9 Windows 2000 / XP / Vista / 7 Sekaiju2.9.zip 2012/03/04 5.92MB
■Sekaiju2.8 Windows 2000 / XP / Vista / 7 Sekaiju2.8.zip 2012/02/10 5.90MB
■Sekaiju2.7 Windows 2000 / XP / Vista / 7 Sekaiju2.7.zip 2012/01/10 5.90MB
■Sekaiju2.6 Windows 2000 / XP / Vista / 7 Sekaiju2.6.zip 2011/11/06 5.84MB
■Sekaiju2.5 Windows 2000 / XP / Vista / 7 Sekaiju2.5.zip 2011/06/05 5.84MB
■Sekaiju2.4 Windows 2000 / XP / Vista / 7 Sekaiju2.4.zip 2011/05/08 5.84MB
■Sekaiju2.3 Windows 2000 / XP / Vista / 7 Sekaiju2.3.zip 2011/03/06 5.79MB
■Sekaiju2.2 Windows 2000 / XP / Vista / 7 Sekaiju2.2.zip 2011/02/05 5.66MB
■Sekaiju2.1 Windows 2000 / XP / Vista / 7 Sekaiju2.1.zip 2010/07/30 5.46MB
■Sekaiju2.0 Windows 2000 / XP / Vista / 7 Sekaiju2.0.zip 2010/06/06 5.43MB
■Sekaiju1.9 Windows 2000 / XP / Vista / 7 Sekaiju1.9.zip 2010/05/04 3.32MB
■Sekaiju1.8 Windows 2000 / XP / Vista / 7 Sekaiju1.8.zip 2010/02/28 3.30MB
■Sekaiju1.7 Windows 2000 / XP / Vista / 7 Sekaiju1.7.zip 2010/02/02 3.28MB
■Sekaiju1.6 Windows 2000 / XP / Vista / 7 Sekaiju1.6.zip 2010/01/03 3.03MB
■Sekaiju1.5 Windows 2000 / XP / Vista / 7 Sekaiju1.5.zip 2009/12/13 2.92MB
■Sekaiju1.4 Windows 2000 / XP / Vista / 7 Sekaiju1.4.zip 2009/09/06 2.64MB
■Sekaiju1.3 Windows 2000 / XP / Vista / 7 Sekaiju1.3.zip 2009/07/14 2.57MB
■Sekaiju1.2 Windows 2000 / XP / Vista / 7 Sekaiju1.2.zip 2009/07/05 2.57MB
■Sekaiju1.1 Windows 2000 / XP / Vista / 7 Sekaiju1.1.zip 2009/01/17 2.43MB
■Sekaiju1.0 Windows 2000 / XP / Vista / 7 Sekaiju1.0.zip 2008/12/27 2.42MB

Older version than Sekaiju 1.0 has been stopped releasing because of rough-around-the-edges, sorry.


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