GB
12
3) With the crossfader, it is now possible to fade be-
tween the two selected channels.
If both channels are to be fed to the outputs at the
same time, set the crossfader to the mid-position.
4) With the master control (21) adjust the desired total
level which is available at the master output (29). In
case of overload [red LEDs of the VU meter (2) light
up] reduce the master level.
5.3 Beat counter
The two beat counters of the mixer measure the beats
per minute (BPM) for the two channels selected with
the ASSIGN switches for the crossfading function. The
measured BPM are shown via two displays.
Note: the beat counters only evalute bass beats which
occur four times in succession at approx. the same
distance (
4
/
4
beat). Music pieces which do not show
any clear bass drum line in the
4
/
4
rhythm are not reco-
gnized by the beat counters and displayed with wrong
values.
5.3.1 BPM displays
Most CD players for disco applications are provided
with operating elements to change the speed of the
beat (pitch controls). For matching the pitch of one
music piece to that of the other via the pitch control
when crossfading between the connected audio sour-
ces (e.g. two CD players), the two BPM displays of the
mixer serve as optical aid.
The left BPM display (14) shows the beats for the
channel selected with the left ASSIGN switch (13) and
the right BPM display (18) the beats for the channel
selected with the right ASSIGN switch (19). If no music
piece is playing on the selected channel or if the
respective ASSIGN switch is set to “0”, the display is
[- - -].
The display range is between approx. 90 BPM and
170 BPM. If the BPM of a title are lower, the display is
[- - -] or a wrong value. Higher BPM values are dis-
played in a divided way (e. g. display 90 BPM in case
of an actual value of 180 BPM).
5.3.2 Beat Offset display
To obtain a smooth transition between the titles when
crossfading, the beats of both titles have to be syn-
chronized, i. e. they must be exactly the same. Via cor-
responding operating elements on the CD player the
pitch of one title can be matched so that it is syn-
chronized with the second title.
When synchronizing the beats of the two music ti-
tles to be crossfaded, the LED indication BEAT OFF-
SET (17) serves as optical control:
Lighting up of a red LED:
the two titles are not synchronized
Lighting up of a yellow LED:
the two titles are almost synchronized
Lighting up of the green LED:
the two titles are synchronized
Note: If the BPM of the two titles are far away from
each other, the beat offset display does not respond.
5.4 Mixing of the audio sources
1) To mix the connected audio sources, switch off the
crossfading function. For this purpose, set the
ASSIGN switches (13 and 19) to position “0”.
2) Turn up the master control (21) so much that the
mixing relation of the audio sources can be ad-
justed in an optimum way.
3) With the level controls of the input channels adjust
the desired volume relation of the audio sources
with each other. If a channel is not used, its level
control should be set to minimum.
4) By means of the VU meter (2) adjust with the mas-
ter control the desired total level which is available
at the master output (29).
The optimum level is obtained if the 0 dB range
of the VU meter shortly lights up with music peaks.
In case of overload (red LEDs light up), reduce the
output level with the master control and/or the level
controls of the input channels.
5.5 Talkover function
The talkover function serves for better intelligibility
of microphone announcements during the music pro-
gramme. To activate the funcion for a microphone
channel, press the AUTO TALK button (10) of the
channel: if the button is pressed (LED next to the but-
ton lights up), the levels of the channels CH 1 to CH 4
are automatically attenuated by 15 dB during micro-
phone announcements. To switch off the function, re-
lease the button again.
5.6 Pre fader listening (PFL) of the channels via
headphones
Via the pre fader listening function each of the input
channels CH 1 to CH 4 can be monitored via head-
phones connected to the jack (24), even if the corre-
sponding channel fader (15) is set to minimum. Thus,
e. g. the desired title on a CD can be selected or the
right moment for fading in an audio source can be
timed.
Alternatively it is also possible to monitor the music
programme currently playing ahead of the master con-
trol (21).
1) To monitor an input channel ahead of the channel
fader, press the PFL button (12) of the channel
(LED above the button lights up) and slide the MIX
control (23) to the extreme left position (“PFL”).
To monitor the current music programme ahead
of the master control, slide the MIX control to the
extreme right position (“PGM”).
2) To switch the VU meter (2) to the headphone out-
put, press the button (3). Then the VU meter shows
the signal selected with the MIX control.
3) With the level control (25) adjust the desired head-
phone volume.
CAUTION: Do not adjust the headphones to a high
volume. Permanent high volumes may damage a
person’s hearing! The human ear gets accustomed
to high volumes which do not seem to be that high
after some time. Therefore, do not further increase
a high volume after getting used to it.
