The Optical track of Mixed Mode CD has following features: there is only one session with several optical tracks. Data is usually on the first track, the second track is to store music, a piece of music per track.
The above picture is the structure of optical tracks in mixed CD. This disc has only one session, the first session is to store data with a drive letter of "MIXCD", which is set with directory structure. The second to eighth track stores seven songs.