Lexicon DC-1 owner manual AC-3 Status Display Dolby Digital version

DC-1 Effects

Lexicon

AC-3 Status Display (Dolby Digital version)

The following five effects are available only in the Dolby Digital version of the DC-1. Each of these effects provides an AC-3 Status Display in the parameter menu. This display contains the following information.

MATRIX ENCODED: YES indicates a Dolby Digital input is matrix en- coded; No indicates it is not.

DOWNMIX: YES indicates material is being downmixed for speaker con- figuration, or because a two-channel effect is being utilized; NO indicates no downmixing is taking place.

DATA RATE: 32-640kb, depending on the data rate of the incoming signal.

SAMPLE RATE: 44.1kHz or 48kHz depending on the incoming signal.

PGM CONTENT: shows you the actual spatial characteristics of the incom- ing soundtrack. The information appears as F/S.LFE where F=the number of front channels andS=the number of surround channels.LFE=.1 if the LFE channel is on.

For example, a given source may display 3/2.1, indicating that the source was recorded with 3 front channels, 2 surround channels, and the LFE channel. When the designation .1 indicates that the LFE channel is on, as in our example, a level meter at the bottom of the display will show LFE channel activity. (Note, that there are instances where the LFE channel is on, but no activity shows in the meter display. This is normal and should not cause concern.)

REF OFFSET indicates the Dialog Normalization value that is present in AC-3 bitstreams. In AC-3, dialog is reproduced at -31dBFS (31dB below full scale). If the program material was mixed so that dialog is at -31dBFS, then REF OFFSET=0dB. If the dialog was mixed at a "hotter" level, for example, -21dBFS, then REF OFFSET = -10dB and the DC-1 would adjust the levels down 10dB to bring dialog back to -31dB.

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