Files with asd file extension can also be found as metadata files for Advanced Systems Format (ASF) multimedia file format.
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.ASD file extension - Advanced Streaming Format description data
What is asd file? How to open asd files?
File type specification:
The asd file extension is also used for a description files for Advanced Systems Format (ASF), the standard video format included in basic media formats supported by Microsoft Windows.
Probably contains metadata related to the actual multimedia file.
The default software associated to open asd file:
Microsoft Windows Media Player 
Company or developer:
Microsoft Corporation
Microsoft Windows Media Player is default multimedia player installed in Microsoft Windows. WMP can manage music, videos and pictures in computer, play or view them, sync them with portable devices, or burn them on CD/DVD media. It also supports home media sharing with other computers.
List of recommended software applications associated to the .asd file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open asd file, edit asd file, convert asd file, view asd file, play asd file etc. (if exist software for corresponding action in File-Extensions.org's database).
Settings file type for software that use asd file - Advanced Streaming Format description data
Programs supporting the exension asd on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Microsoft Windows Media Player for settings asd file action.
