6 - General AmpliTube™ control/display
30
General AmpliTube™ control/display
Input Level
The input signal level
(fig. 44)
is very important in AmpliTube™ because the
preamplifier stages are physically modeled after real circuits, where the
signal level is affecting the timbre that’s produced.
Always check the three LEDS labeled “Input Level” on the right top corner of
the interface.
- the
yellow
one shows that a too little signal is present, from -
- the
green
one tells that the signal is OK
- the
red
one, that should light only occasionally, shows that the input is
close to overload.
AmpliTube™ does not have an “input level” knob, because it’s very impor-
tant that the level is actually good at the analog to digital converters in the
audio system.
If the level is too low the input the A/D converters will work with a lower
resolution and the sound will not be as good as it could be, if it is too high
there will be clipping even with AmpliTube™ clean settings.
During normal playing the green LED should be the one that lights most
often.If the yellow one is lighting most often then increase the gain of your
preamplifier or audio card break box; if the red one is blinking reduce it sli-
ghtly.
Gate
The very first stage of AmpliTube™ is the noise gate
(fig. 45)
.
It is an ultra fast noise gate that is able to cut the input of AmpliTube™ when
the signal is lower than a certain threshold. This eliminates the noise back-
ground typical of the guitar pickups / preamp system when the instrument
is not playing.
Very useful at high gain settings because, being placed before the amplifier,
it can effectively clean up the signal during the silence parts of the perfor-
mance.
Start by setting the Gate knob fully counterclockwise. This completely
bypasses the Gate, because the threshold is set at the minimum, which is a
very low signal level.
You can check the Gate action by watching the red LED positioned near the
Gate knob. When the Gate closes the LED lights. During normal play the LED
should always be off, and should light only when the strings are not vibra-
ting, showing that the gate is closed.
Chapter 6
6.1
6.2
fig. 44
fig. 45
