MPlayback 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))
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 RSL SROperation Amplifier
29GB