Bryston SP1.7 Series Instructions Manual page 12

13. Mode Button
This button is used to select one of 13 effects for synthesizing surround sound with 2-channel source material.
Pressing the button repeatedly will scroll through the modes:
You can select a Surround Mode for the Surround or THX listening
modes at any time, even if the effect is not immediately active (such
as the case when a 5.1 channel bitstream is present). Two Surround
Mode settings are memorized for each input – one associated with
the Surround listening mode, and one associated with the THX
listening mode.
10
MODE
Available with THX Listening Mode...
PLII Film
Pro Logic
NEO:6 Cinema
Available with Surround Listening Mode...
PLII Film
PLII Music
Pro Logic
NEO:6 Cinema
NEO:6 Music
Stereo5
Party
Hall
Stadium
Club
Theatre
Church
Natural