CHORDS File
What are CHORDS files and how to open them
Are you having problems opening a CHORDS file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your CHORDS files.
What is a CHORDS file?
A .CHORDS file is a SuperJAM! Chords file.
SuperJAM! Chords files store chord progressions defined in SuperJAM!, a music‐composition and accompaniment program developed by The Blue Ribbon SoundWorks for the Commodore Amiga. These files record the chord structure for sections of a SuperJAM! arrangement - such as intros, fills, breaks, verses, choruses - allowing the program to generate backing band parts automatically against those chords.
SuperJAM! writes these files as part of the song‐creation workflow: after selecting a style, defining a "section" and entering (or real-time capturing) chord changes, the chords are saved so the internal or MIDI band follows them during playback. Users might also export or use them within SuperJAM!'s snapshot and song section tools to build the full song structure from linked sections.
Files begin with the ASCII header "CHRD" stored in the first four bytes of the file (bytes 0-3), followed by two zero bytes (making "CHRD" then 0x0000 at offset zero). This signature identifies the file as a SuperJAM! Chords file.
How to open CHORDS files
Important: Different programs may use files with the CHORDS file extension for different purposes, so unless you are sure which format your CHORDS file is, you may need to try a few different programs.
We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!
Last updated: August 31, 2026
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