Audio Tracks (for AudioCD/MixedCD/CDExtra).
Multi-Tracks (Several DataTracks and Audio Tracks and Sub-Tracks)
Multi-Sessions (A CD-R can be written several times until the data on the CD is full. The CD-burner creates a new session after the existed ones until there is no more space left)
Finally:
Mounts as a virtual-burner, so i can use WindowsMediaPlayer to ‘Burn’ audio-cd with it.
WinCDEmu is either a simple yet free tool, that allows mounting data disc images, rather than an all-in-one solution, that supports all and everything.
There are plenty of free tools for creating disc images and re-implementing such functionality in WinCDEmu would be unreasonable. As for the audio tracks/mixed CD images, I would recommend using various free software for converting those tracks to WAV/etc. files, as supporting such images in WinCDEmu would not be simple.
The problem is not about the format, it is about special SCSI commands that Windows uses to access non-data track. Anyway, I’ll consider supporting it in the future.