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Dolby Laboratories DP564 User Manual

Page 92

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DP564 Multichannel Audio Decoder

Appendix A: Metadata

A-22

Lo/Ro Surround Mix Level

This parameter indicates the level shift applied to the surround channels when
downmixing to a Lo/Ro output. When Extended BSI parameters are active, this
parameter is used, and the Surround Mix Level parameter in the universal parameters
is not.

Lo/Ro Surround Mix Level Setting

1.414 (+3.0 dB)
1.189 (+1.5 dB)

1.000 (0.0 dB)

0.841 (–1.5 dB)
0.707 (–3.0 dB)
0.595 (–4.5 dB)
0.500 (–6.0 dB)

0.000 (–999 dB)

Surround EX Mode

This parameter is used to identify the encoded audio as Surround EX

encoded

material. This parameter is only used if the encoded audio has two surround channels.
An amplifier or receiver with Dolby Digital Surround EX decoding can use this
parameter as a flag to switch the decoding on or off automatically. The behavior is
similar to the Dolby Surround Mode parameter.

Surround EX Setting

Not Indicated

Not Surround EX

Dolby Surround EX

A/D Converter Type

This parameter allows audio that has passed through a particular A/D conversion
stage to be marked as such so that a decoder may apply the complementary D/A
process.

A/D Converter Type Setting

Standard

HDCD