Casio WK-1800 keyboard user tone file
File type: Audio and sound file
A CT3 file is a user tone file for the Casio WK-1800 keyboard.
It stores the data for one user-created or user-saved tone rather than a recording of keyboard audio.
Found 4 different file type records with the same ct3 filename suffix.
File type category:
Audio and sound file
Date updated: October 7, 2026
The CT3 file extension is associated with user tones used by the Casio WK-1800, a 76-key portable keyboard with a floppy disk drive for song play and storage.
The keyboard was released around 2003. A CT3 file contains a single user tone and is intended for loading and storing that tone with the keyboard.
CT3 is a proprietary keyboard data format, not a conventional audio format.
The CT3 file extension is unrelated to the CT-3 General Business Corporation Franchise Tax Return form used in New York. Those forms are available from the New York State Department of Taxation and Finance.
Open a CT3 file by loading it from a compatible floppy disk with a Casio WK-1800 keyboard. The keyboard can use the file as a user tone; ordinary media players cannot play it as audio.
A CT3 file cannot normally be converted directly to an audio format because it contains tone data, not recorded sound. It is intended to be loaded into the Casio WK-1800.
To create an audio file, the tone must be played on the keyboard and recorded through an audio connection using separate recording equipment or software.
File type category:
Various data file
Date updated: February 15, 2019
The ct3 file extension is associated with the CaseMap, a fact and issue management software for Microsoft Windows operating system developed by LexisNexis.
The ct3 file stores case analysis template used by CaseMap version 3.
Use CaseMap to open *.ct3 templates.
Probably can be exported to other formats.
File type category:
Graphics file
Date updated: December 12, 2018
The ct3 file extension is associated with the CTRAN/W, a CAD solution for Microsoft Windows operating system that is used for model the movement of contaminants.
The ct3 file stores sketch created in the CTRAN/W tool.
Use CTRAN/W to open *.ct3 sketch files.
Probably can be exported to other formats.
File type category:
Various data file
Date updated: October 4, 2026
Microsoft Systems Management Server (SMS) was a Microsoft system management and servicing solution for the Windows operating system. The ct3 file belongs to this legacy software.
The file stores control data for an SMS tool or operation. It is an internal support file rather than a document intended for normal editing.
SMS was later replaced by Microsoft's Configuration Manager product. As a result, the ct3 format is generally encountered only in older SMS installations or archived data.
A ct3 file is normally opened by the Microsoft Systems Management Server installation or tool that created it, rather than by a general-purpose file viewer. Use the corresponding SMS software on Windows when the file is part of an active or archived SMS system.
Do not edit the file manually. If the associated SMS installation is unavailable, its contents may not be meaningful when opened as a standalone file.
Because the ct3 file contains internal SMS control data, it is not normally converted as a standalone document.
When the data is still needed, use the original SMS environment or an appropriate administration or migration tool to retrieve or export the relevant information instead of converting the file directly.
Software applications that handle other tasks involving ct3 files:
Microsoft Windows
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