Model DP569 User’s Manual Metadata
A–15
Center Downmix Level
When the encoded audio has three front channels (L, C, R), but the consumer has
only left and right front speakers, this parameter indicates the nominal downmix level
for the center channel with respect to the left and right channels. Dolby Digital
decoders use this parameter during downmixing in Lo/Ro mode when Extended BSI
parameters are not active.
Table A-5 Center Downmix Level
Center Downmix Level
Setting Definition
0.707 (–3 dB) default The center channel is attenuated 3 dB and
sent to the left and right channels.
0.596 (–4.5 dB) The center channel is attenuated 4.5 dB and
sent to the left and right channels.
0.500 (–6 dB) The center channel is attenuated 6 dB and
sent to the left and right channels.
Surround Downmix Level
When the encoded audio has one or more surround channels but the consumer does
not have surround speakers, this parameter indicates the nominal downmix level for
the surround channel(s) with respect to the left and right front channels. Dolby Digital
decoders use this parameter during downmixing in Lo/Ro mode when Extended BSI
parameters are not active.
Table A-6 Surround Downmix Level
Surround Downmix
Level Setting Definition
0.707 (–3 dB) default
The left and right surround channels are each
attenuated 3 dB and sent to the left and right
front channels, respectively.
0.5 (–6 dB) Same as above, but the signal is attenuated 6 dB.
0 (–999 dB) The surround channel(s) are discarded.
Dolby Surround Mode
This parameter indicates to a Dolby Digital decoding product that also contains a
Dolby Pro Logic decoder (for example a 5.1-channel amplifier) whether the two-
channel encoded bitstream contains a Dolby Surround (Lt/Rt) program that requires
Pro Logic decoding. Decoders can use this flag to automatically switch on Pro Logic
decoding as required.