Sony STR-DA5700ES Operating Instructions Manual page 12

Indicators on the display
A SW
Lights up when subwoofer(s) is (are)
connected and the audio signal is output
from the PRE OUT SUBWOOFER
jack(s).
B Playback channel indicator
The letters (L, C, R, etc.) indicate the
channels being decoded. Based on the
speaker settings, the boxed letter(s) vary
to show how the receiver downmixes or
upmixes the source sound.
L
Front Left
R
Front Right
C
Center (monaural)
LH
Left High
RH
Right High
SL
Surround Left
SR
Surround Right
S
Surround (monaural or the surround
equipment obtained by Pro Logic
processing)
12
US
SBL
Surround Back Left
SBR
Surround Back Right
SB
Surround Back (the surround back
equipment obtained by 6.1 channel
decoding)
Example:
Recording format: 5.1
Speaker pattern: 3/0.1
Sound Field: A.F.D. Auto
C INPUT indicator
Lights up to indicate the current input.
AUTO
The INPUT MODE is set to "AUTO."
HDMI
COAX
OPT
MULTI (MULTI CHANNEL INPUT)
ARC (page 88)
D HDMI OUT A + B (page 86)
E SLEEP (page 94)
F MEM
Lights up when the preset memory
function is activated.