Behringer BCA2000 - Manual (Page 9)

9
B-CONTROL AUDIO BCA2000
The LINE STEREO button feeds the stereo signal of both
line inputs ( ; see page 10) into the stereo input channel.
If the LINE STEREO button is pressed, channel two
becomes a stereo channel, and the PAN control assumes the
BALANCE function (see 4 above). This allows a maximum of
three input signals (1 x mic/guitar and 1 x stereo) to be processed
simultaneously (see also ch. 4.1).
3.1.2 Main/Monitor section
The 100-mm MAIN fader controls the output signal
(MAIN OUT).
The PHONES controls adjust the volume of connected
headphones.
The CTRL ROOM control adjusts the volume of the control
room outputs .
The PHONES outputs (individually adjustable; see 12) are
used for connecting headphones. You can listen to the
main output, the input sum or the mix of both signals.
The MONITOR button activates the direct monitoring
function, and the DIR I/O LED lights up. When the button is
not pressed, auto monitoring is active.
With auto monitoring, switching between input and recorded
tracks is done automatically by your host software (audio
sequencer/software mixer). System-induced latencies occur
between the recorded signal and computer playback. To avoid
this, you can switch to DIRECT I/O during a recording session.
This provides you with delay-free signal routing (see also ch. 4.3).
LISTEN switches the monitor signal (control room and
phones) to mono (e.g. to check mono compatibility).
DIM lowers the level of phones and control room outputs
by -20 dB.
The MUTE button mutes the phones and control room
outputs.
The MONITOR BALANCE control adjusts the volume
balance between the input sum and the output signal (main
out). The control is only active if the MONITOR button
is pressed (direct monitoring).
The AUDIO ROUTING diagram shows the audio signal
flow of your B-CONTROL. The integrated LEDs show the
current selection of inputs and the status of buttons - .
The DIGITAL IN button lets you select a digital input source
(“COAXIAL” or “OPTICAL”).
OPTICAL OUT selects the format for the optical output
. Available choices are “ADAT” (eight-channel or four-
channel with “ADAT S/MUX”) and “2-CHANNEL”.
CH. 1-2/CH. 7-8 button: if OPTICAL OUT is set to
“2-CHANNEL”, the CH. 1-2/CH. 7-8 button lets you select
which USB output channels are played back via the digital
optical and coaxial outputs. If OPTICAL OUT is set to “ADAT”,
the CH. 1-2/CH. 7-8 setting only applies to the coaxial output.
The status LEDs for buttons to are located in the
audio routing diagram .
SAMPLE RATE LEDs: All digital inputs and outputs have
the same sample rate, which is determined by your host
software (unless you are synchronizing to an external
wordclock source). If you change the sample rate in the
software, the display on your BCA2000 automatically
switches to the new value. For example, if you select
44.1 kHz in your software, the 44.1 kHz LED illuminates. If
an external wordclock signal is connected, the DIGITAL
IN LED illuminates. If this external signal also has a sampling
rate of 44.1 kHz, both the 44.1 kHz and the DIGITAL IN
LEDs will illuminate.
The METER button lets you switch the LED level meters
( and ) between input and output signals.
The LED level meter displays either the input sum signal
post-A/D converter or the digital output signal pre-main
fader, depending on the position of the METER button .
The LEDs for channels 3 - 8 indicates signal presence in
the digital channels 3 - 8 (green SIG LEDs) or if levels are
too high and may cause distortion (red CLIP LEDs).
These status LEDs display the following:
MIDI IN, OUT A and OUT B illuminate if MIDI signals are
present at the respective connectors.
USB FULL and USB HIGH LEDs indicate status and type of
the USB connection. The appropriate LED will remain
illuminated as long as your BCA2000 is connected to your
computer via USB (and the computer is powered up).
3.1.3 Dynamics section
Your BCA2000 features a combined noise gate/limiter
(dynamics) section for the analog input signal. This section is
located directly pre-A/D converters.
The ON button activates the dynamics section.
The NOISE GATE control adjusts the threshold or signal
level below which the noise gate is activated; signals below
this level are muted. Turning the NOISE GATE control fully
counterclockwise (-
∞
) deactivates the noise gate.
When the level of a signal falls below the threshold value,
this red THRESHOLD LED illuminates (noise gate active).
The limiter limits the signal to a maximum level, which can
be adjusted. Turning the LIMITER control fully clockwise
deactivates the limiter.
The LIMIT LED illuminates when the limiter is active.
+
If you only want to use the noise gate, set the
LIMITER control to zero (fully clockwise). If you only
want to use the limiter, turn the NOISE GATE control
to - ¥ (fully counterclockwise).
+
The noise gate/limiter section works in fixed
stereo, i.e. the left and right channels always
function jointly. When processing two mono signals,
these signals may be processed inaccurately.
3. CONTROL ELEMENTS AND CONNECTIONS