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APPENDIX
Surround Mode Description Incoming Bitstream or Signal
Dolby Pro Logic II Variant of Dolby Pro Logic II that emphasizes use of the surround • Dolby Digital 2.0 or 2.1
Game channels and subwoofer for total immersion in the video gaming • Analog (2-channel)
experience. • Tuner
• PCM (32kHz, 44.1kHz, 48kHz, 96kHz)
Dolby Pro Logic Original version of Dolby Pro Logic that steered a mono signal • Dolby Digital 2.0 or 2.1
containing information below 7kHz to the surround channels. • Analog (2-channel)
• Tuner
• PCM (32kHz, 44.1kHz, 48kHz, 96kHz)
Dolby Pro Logic IIx An expansion of Dolby Pro Logic II that adds a surround back channel
Mode Group
which may be played through one or two surround back speakers.The
Dolby
Pro Logic IIx modes may be selected not only with Dolby Digital bit-
streams, but thanks to the AVR 3550HD’s post-processor, they may also be used
with some DTS bitstreams to add a surround back channel to 5.1 modes.
Dolby Pro Logic IIx This mode is similar to Dolby Pro Logic II Movie, with an added surround • Dolby Digital 2/0/.0 or .1, 2/2/.0 or .1,
Movie back channel. 3/2/.0 or .1, EX
• Analog (2-channel)
• Tuner
• PCM (32kHz, 44.1kHz, 48kHz, 96kHz)
Dolby Pro Logic IIx This mode is similar to Dolby Pro Logic II Music, including the availability • Dolby Digital 2/0/.0 or .1, 2/2/.0 or .1,
Music of center width, dimension and panorama adjustments. Dolby Pro Logic IIx 3/2/.0 or .1, EX
Music adds a surround back channel. • Analog (2-channel)
• Tuner
• PCM (32kHz, 44.1kHz, 48kHz, 96kHz)
Dolby Pro Logic IIx This mode is similar to Dolby Pro Logic II Game, with the added benefit • Dolby Digital 2/0/.0 or .1
Game of a surround back channel. • Analog (2-channel)
• Tuner
• PCM (32kHz, 44.1kHz or 48kHz)
Dolby Virtual Speaker Simulates 5.1 channels when only two speakers are present, or a more See below
Mode Group enveloping sound field is desired.
Dolby Virtual Speaker When only two main speakers are present, the Reference mode virtualizes • Dolby Digital (uses only two-speaker mode
Reference a full surround presentation with accurate localization. when s
ignal does not contain center channel
information)
• Analog (2-channel)
• Tuner
• PCM (32kHz, 44.1kHz or 48kHz)
Dolby Virtual Speaker Wide mode may be used with two main speakers to widen the front • Dolby Digital (number of channels available
Wide soundstage by virtualizing the locations of the left and right speakers. varies by number of channels in signal)
• Analog (2-channel)
• Tuner
• PCM (32kHz, 44.1kHz or 48kHz)
DTS Digital Using a different encoding/decoding method than Dolby Digital, it also • DTS 1/0/.0 or .1, 2/0/.0 or .1, 3/0/.0 or .1,
provides up to five discrete main channels, plus an LFE channel. 3/1/.0 or .1, 2/2/.0 or .1, 3/2/.0 or .1
• DTS-ES Matrix (played as 5.1)
• DTS-ES Discrete (played as 5.1)