B&K Series 2, Руководство пользователя

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Plug and Play Timing Setup
Plug and play timing pertains to the internal delays associated with the Plug n Play audio detection system.
DO NOT ADJUST THESE PARAMETERS UNLESS THERE IS A PROBLEM HEARING AUDIO
Your preamplifier has default audio Plug n Play settings that work with the majority of A/V sources and digital
audio bitsreams. However, with the introduction of new A/V products into the market place, these Plug n Play
audio detection parameters may need to be adjusted to improve upon the listening experience. An example
might be that there is an inordinate amount of audio pops or snaps while changing Cable, HDTV or SAT
channels. The quality of the original digital bitstream depends on many factors. It is our desire to minimize the
amount of audio pops and snaps that may be transmitted thru to the speakers. Your preamplifier does not
“filter” any imperfect digital bitstreams, nor does it make the digital bitstream a valid signal. However, because
audio pops snaps are undesirable, your preamplifier will try to mute the audio before you hear it when there is
a digital audio bitstream error. Although your preamplifier’s muting circuitry may stop most of the digital errors
from being heard, it does not guarantee that a digital error may never be heard.
The Plug n Play menu may be used to adjust mute times while the preamplifier is automatically switching
between different types of digital audio formats (AC3 5.1 / DTS 5.0 / DTS 5.1, PCM). Usually these audio
pops and snaps may be traced to a digital error on the incoming digital audio bitstream and corrected with a
simple Mute Time adjustment.
Default Settings
Mute Time - 1.0 Sets the mute time for use with invalid digital audio information. In
addition it is used to mute when a digital signal first appears or changes modes. Most notably, some DVD
recorders output about 1.5 seconds of invalid digital bitsreams after you close the drawer.
Digital Sticky - 2.5 Only applies to changes from any digital audio mode back to analog.
Changes from analog to digital are always fast. This parameter may be set long because most Cable and
SAT receivers drop the digital audio bitstream when changing channels and there is really no need to revert
back to analog. Note, some Cable and SAT receivers only output analog audio for certain broadcast
channels. If the Digital Sticky parameter is set too long there may be a longer period of silence before you
hear the audio with an analog only broadcast channel.
Mode Sticky - 0.1 Only applies to changes from AC3 or DTS to PCM. Changes from PCM to
AC3 or DTS are typically fast. Many DVD players drop to PCM when skipping tracks. There is no need for the
p r e a m p l i f i e r to drop to PCM processing during this interval. However, because many DVDs contain AC3,
DTS and PCM data on different tracks, setting the Mode Sticky parameter too long may cut off the audio from
the beginning of AC3, DTS or PCM digital audio bitsreams.
Parameters Sticky - 0.1 Applies to how quickly the preamplifier will react to changes in sample
rate, number of speaker channels in the bitstream, etc. Occasionally some players erroneously indicate these
changes which causes the preamplifier to needlessly mute and adjust itself to these new parameters. Setting
this parameter longer reduces the chance that the preamplifier will respond to an erroneous change but does
increases the likelihood of muting the audio at the start of an audio playback.
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