Sound Qualities is a parent element for six subelements (some with their own subelements and attributes). Not all elements are used for all source types. These elements describe the characteristics of the sound, such as mono or stereo, track layout, etc.:
Sound Qualities - Sound Field
The aural space arrangement of the sound recording, such as mono or stereo.
Film, Videotape, Videodisc, Audiotape, Optical disc, Analog disc. mono; stereo; joint stereo; quadrophonic; 5.1; 7.1; Other
Cylinder, Wire recording. mono