Onkyo TX-NR545 Manual page 68

Game­Sports
AllCh Stereo
Full Mono ＊4
T­D
＊1 Cannot be selected when the input format is monaural or 2 ch.
＊2 Center speaker or surround speakers need to be installed.
＊3 Surround speakers or height speakers need to be installed.
＊4 Center speaker, surround speakers or height speakers need to be
installed.
DTS­ES
Direct
DTS ＊1
ES Matrix ＊2
ES Discrete
Dolby Surround
Game­RPG
Game­Action
Game­Rock
Game­Sports
AllCh Stereo
Full Mono ＊5
T­D
＊1 Can only be selected when the back speakers are not installed.
＊2 Back speakers need to be installed.
＊3 Height speakers need to be installed.
＊4 Surround speakers or height speakers need to be installed.
＊5 Center speaker, surround speakers or height speakers need to be
installed.
STEREO button
You can select a listening mode for stereo and all channel stereo sources.
All format
Stereo
AllCh Stereo
＊3
＊4
＊2
＊3
＊4
＊4
＊4
＊4
＊5
＊1