SysEx Librarian data
File type: Audio and sound file
A wsx file contains internal data used by SysEx Librarian on Apple macOS.
It is an application support file rather than a standard MIDI System Exclusive data file.
Found 2 different file type records with the same wsx filename suffix.
File type category:
Audio and sound file
Date updated: October 14, 2026
The wsx file extension is associated with SysEx Librarian, a MIDI utility from Snoize for Apple macOS. SysEx Librarian communicates with MIDI devices using System Exclusive (SysEx) messages.
A wsx file stores data used internally by SysEx Librarian. It supports the application's own operation and is not intended as a general-purpose audio or MIDI exchange format.
The format is specific to SysEx Librarian and is not normally used independently of that software.
Open a wsx file with SysEx Librarian on macOS. The application normally uses this type of file as internal data rather than opening it as a standalone document.
A wsx file cannot be meaningfully converted with a general-purpose file converter because it contains internal SysEx Librarian data, not standard SysEx data. Use SysEx Librarian's own save or export functions when transferring MIDI System Exclusive data.
Software apps that create wsx files:
Apple macOS / Mac OS X
Software applications that handle other tasks involving wsx files:
Apple macOS / Mac OS X
File type category:
Settings, options, themes or skins file
Date updated: April 12, 2019
Record marked as obsolete and not updated for a long time.
The wsx file extension is associated with the WinMX peer-to-peer file sharing protocol and client for Windows.
The wsx file stores protocol list.The WinMX was discontinued in 2005 under threat of court. However it still in development alternative client called WinPY.
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