Files with x1d file extension can be found as part of VIcon MX program. Unprocessed data file.
X1D file extension - Vicon unprocessed data
What is x1d file? How to open x1d files?
File type specification:
The x1d file extension is related to Vicon MX, a motion measurement and analysis system and used for one of its default file type.
The x1d file contains unprocessed data from analog data capture in Vicon Nexus. By default, x1d files are saved to the active Session folder of the open database.
This x1d file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.