Open CL5 File
The CL5 format and extension file is a CD creation project created with Easy CD Creator 5, that's where the extension comes from.
The CL5 file contains references to the files that will be included on the CD, as well as other settings, and can include data files or a playlist of audio files to create an audio CD.
It is important to note that the CL5 file is not an audio or multimedia file, therefore it is not playable with any audio player.
Although CL5s can be created and opened with Roxio CD Creator, they cannot be opened with Roxio's Easy Media Creator software.