Editing Matrix decoder (section)

=== Ghent microphone ===
In addition, CBS created the SQ Ghent Microphone, which was a spatial microphone system using the [[Georg Neumann|Neumann]] QM-69 mic. The signals from the QM-69 were differenced, and then phase-matrixed into 2-channel SQ.<ref>{{cite journal
| last = Bauer
| first = Benjamin B.
|author2=Louis A. Abbagnaro |author3=Daniel W. Gravereaux |author4=Trevor J. Marshall
 |date=January–February 1978
| title = The Ghent Microphone System for SQ Quadraphonic Recording and Broadcasting
| journal = Journal of the Audio Engineering Society
| volume = 26
| issue = 1/2
| pages =2–11
| publisher = [[Audio Engineering Society|AES]]
}}</ref>
With the Ghent Microphone, SQ was transformed from a Matrix into a Kernel and an additional signal could be derived to provide N:3:4 performance.