Eventide BD500, Руководство оператора

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BD500 Broadcast Profanity Delay Chapter 3 Configuration Page 17
©Eventide Inc. 1995-1999
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QAL Quality
This value governs the extent to which the config-
ured rebuild and ramp to zero time may be deviated
from in order to maintain high audio quality during
rebuild. A setting of 100 percent produces the
best-sounding audio, but allows the unit to deviate con-
siderably from the configured times. The extent of the
actual deviation depends upon the characteristics of
the audio material being processed. If strict adherence
to the configured time is required, the quality can be
set to 0 percent. This is not a recommended setting
though, as it will tend to produce poor audio quality
during rebuild and ramp to zero. The default quality
values should suffice for normal usage.
REA Reaction
This variable chooses what remedy the BD500 will
use in case of a fatal error. The choices are
SHO
(show)
or
HID
(hide.) If
SHO
is chosen, an error message will
be displayed until the user presses the DUMP button
or removes power from the unit. If
HID
is chosen, the
unit will immediately reboot and start up again, after
a short delay, resuming the operation that was inter-
rupted by the error. In either case the error will be
logged. See Appendix F.
REB Rebuild Time
The rebuild time is how long the BD500 will need
to build from 0.00 delay to maximum delay. This is
used to start up the delay or recover from DUMP. The
rebuild time affects the slowness of the audio material
passing through the delay and is measured in seconds.
The factory default is 120 seconds, or 2 minutes, for an
8-second maximum delay. The actual time to complete
a rebuild may be longer, depending on the audio con-
tent, and the settings of several other configuration
parameters.
RT0 Ramp To Zero Time
The ramp to zero time is how long the BD500 will
need to go from maximum delay to 0.00 delay. This is
used to exit out of the delay gracefully. The ramp to
zero time affects the increase of speed of the audio ma-
terial passing through the delay and is measured in
seconds. The actual time to complete a ramp to zero
may be longer, depending on the audio content, and the
settings of several other configuration parameters.
RUN Run mode
This controls what mode the BD500 enters when
leaving bypass mode. The selections are live, wait for
safe, rebuild, and precision fixed delay. Each of these
modes is described elsewhere in this chapter. The fac-
tory default is live.
SAF Safe Time
In many broadcasting situations a control output
from the broadcast delay will be used to control a tele-
phone connection or auxiliary microphone input. The
control input is only connected when enough delay has
been built up to allow the operator to delete offending
vocals. The delay length which must exist to allow the
audio connection is called the safe time. The safe time
is related to the reaction time of the operator and the
complexity of what would be called offending speech.
Normally, the safe time is several seconds. Since wait
for safe is used to quickly build the delay to an amount
long enough to be safe, the safe time is also the time
value used by wait for safe. The value displayed while
in bypass is the safe time. This is important informa-
tion for users of the wait for safe feature. The DUMP
button is illuminated only when the delay is larger
than safe time.
SRC Source
This selects the amount of signal from each channel
that will be fed into the signal processor for use in de-
termining best time-to-process. If the unit is unable
to pick good times-to-process, artifacts will be intro-
duced into the output audio. This value may be set to
one of five values, from left to right,
LEF L1 CEN R1
RIG
.
LEF
indicates all of channel 1 and none of chan-
nel 2.
RIG
indicates all channel 2.
CEN
indicates an
even sample of both. This adjustment does not affect
the audio signal levels seen at the outputs.
If only one channel is used for input, set the source
to that channel (
LEF
or
RIG
). If one channel is usually
of poorer quality (i.e., a telephone), give the other
channel priority. For instance, if channel 1 is the lo-
cal microphone and channel 2 is telephone, you might
select
L1
. If channel 2 is a mix of local microphone and
telephone, and channel 1 is never used, select
RIG
.