Yamaha Aventage MusicCast RX-A1070BL Owner's Manual page 19

5.1.2 system [S] (using front presence speakers)
This speaker system uses the front presence speakers to produce a natural 3-dimensional
sound field, and also creates Virtual Surround Back Speaker (VSBS) using the surround
speakers to add a sense of depth to the rear sound field. This system is suited for enjoying not
only 5.1-channel but also for 7.1-channel contents.
X
When using front presence speakers installed to the ceiling or when using the Dolby Enabled speakers as the
presence speakers, configure the "Layout (Front Presence)" setting in the "Setup" menu before performing YPAO
(p.42).
7.1 system (using surround back speakers)
This speaker system creates Virtual Presence Speaker (VPS) using the front, center and
surround speakers to produce a 3-dimensional sound field, and also allows you to enjoy
extended surround sounds using the surround back speakers.
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En