Sony STR-DB798 Operating Instructions Manual page 29

I DIRECT: Lights up when the ANALOG
DIRECT function is activated.
J EQ: Lights up when the equalizer is activated.
K D.RANGE: Lights up when dynamic range
compression is activated (page 43).
L COAX: Lights up when the source signal is a
digital signal being input through the
COAXIAL terminal (page 37).
M OPT: Lights up when the source signal is a
digital signal being input through the
OPTICAL terminal (page 37).
N SLEEP: Lights up when sleep timer is
activated.
O Playback channel indicators: The letters
(L, C, R, etc.) indicate the channels being
played back. The boxes around the letters vary
to show how the receiver downmixes the
source sound (based on the speakers settings).
L (Front Left), R (Front Right), C (Center
(monaural)), SL (Surround Left), SR
(Surround Right), S (Surround (monaural or
the surround components obtained by Pro
Logic processing)), SB (Surround Back (the
surround back components obtained by 6.1
channel decoding)), SBL (Surround Back
Left), SBR (Surround Back Right)
Example:
Recording format (Front /Surround): 3/2
Output channel: When the surround speakers size
parameter is set to "NO"
Sound Field: A.F.D. AUTO
L C
SL
R
SR
29 GB