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Lake People ARTI-ST F10 Mk II Bedienungsanleitung Seite 6

Artificial stereo generator / 90o mono summer
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3. MONO PHASE SHIFTER
This effect is phase-dependent and frequency-in-
dependent.
In this mode, an input signal applied to the left in-
put is split into a two-phase signal with adjustable
phase shift. The resulting signal does not appear
as a pseudo-stereo signal, but becomes "de-locali-
zed". Thus, a virtual spatial appearance is added
to spotlike sound sources. The tone controls are
in-active in this mode. The effect control varies the
amount of phase shift and thus the effect's inten-si-
ty. Phase shift is continuously variable from 0 to
o
+/-135
. With the balance control, the stereo center
can be shifted between left and right.
ATTENTION:
Compared to the input signal, the output signal is
generally shifted by 45
ginal and output signal together causes certain al-
terations in sound. This effect can be avoided by
using the processed signal only.
4. STEREO PHASE SHIFTER
This effect is phase-dependent and frequency-in-
dependent.
In this mode, an adjustable phase shift is added to
the stereo input signal. Like in the latter mode, sig-
nal processing is
frequency independent. The
phase shift can be adjusted from 0 to +/-135
turning the effect control. In position "mono/0
true mono signal is derived from the input signals.
Unlike when simply summing the two input chan-
nels, the typical 3 dB mid emphasis effect does not
occur.
Turning the effect control clockwise causes the
stereo basis to spread. Turning counterclockwise
causes the stereo basis to spread mirrorlike.
o
In "stereo/90
" position, the input signal remains
unaltered. Settings between "stereo/90
o
de/135
" cause further widening of the stereo ima-
ge. Like before, the balance control shifts the ste-
reo center between left and right.
ATTENTION:
Compared to the inputs, the output signal is gene-
o
rally shifted by 45
. Summing original and proces-
sed signal together results in audible frequency al-
terations. This does not occur when using the out-
put signal exclusively.
o
. Therefore, summing ori-
o
o
o
" and "wi-
THE COMPARE BUTTON
offers quick A/B comparison between original and
processed signal. In bypass position, the input sig-
nal remains unaltered and is fed through to the
outputs. The LEDs next to the mode switch stay
unlit. In active position, these LEDs indicate the
operation mode and the signal will be processed
correspondingly.
According to the ARTI-ST F10's capability of pro-
cessing mono and stereo sources, the compare
button's action depends on the operation mode se-
lected. In "mono/stereo simulation" and "mono
phase shifter" modes, the left input signal is fed to
both outputs. In the remaining modes, both input
signals are fed to the corresponding outputs.
ATTENTION:
Caused by the basic operation principle, the
overall output level may slightly differ from the ori-
ginal level. Input/output level ratio has been cho-
sen to be unigain when the effect control is set to
o
"stereo/90
". A smaller amount results in slightly lo-
wer, a higher amount in slighlty higher output level.
THE CLIP LED
A clip circuitry observes the level at both outputs.
by
The LED starts flashing at levels higher than +18
", a
dBu approximately. Thanks to F10's capability of
handling levels of more than +21 dBu, there is still
a safety headroom of minimum 3 dB when the LED
already flashes. The circuitry has been designed to
clearly display even shortest level overshoots.
THE GROUNDLIFT SWITCH
The ARTI-ST F10's case is earthed via the three-
wire mains cord. In order to avoid hum problems,
the internal audio signal ground and protective
earth are not combined. Such problems frequently
occur when appliances are stacked or mounted on
conductive rack rails.
If hum should be audible despite this precaution,
signal ground can be removed from the outputs by
the groundlift switch, thus removing the ground
loop. If the problem cannot be solved this way,
check if any adjacent appliance induces the hum.
In this case, it may be reduced by simply changing
the stacking order.
6

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