Vox VC-4 - Manual (Page 5)

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4. T AP T EMPO F OOTSWITCH & LED
Unless your VC-4 is in Tuner Mode , this footswitch
has two functions:
1. If you tap a tempo on it with your foot it will
change the tempo of the DELAY effect being
used to that tempo – providing a DELAY effect is
being used, of course!
PROGRAMMING NOTE: If you make a TAP
TEMPO change with your VC-4 it won’t be
“remembered” when you either switch to a dif-
ferent program or power down your amp
unless you SAVE it via the amp’s front panel
(see amp manual).
2. If you hold down this switch for more than one
second it will switch the built-in PEDAL between
VOLUME and EXPRESSION modes. How do
you know which one has been selected? Easy,
the EXPRESSION LED (5) tells all! If it’s “on”
EXPRESSION is chosen, if its “off” then the
PEDAL will work as a VOLUME control.
5. E XPRESSION LED
When this LED is “on” it means that the BUILT-IN
PEDAL will function as an EXPRESSION pedal.
When it is “off” it means the pedal is assigned to
control VOLUME.
6. B UILT - IN P EDAL
This pedal can be used as either a VOLUME
PEDAL or as an EXPRESSION PEDAL – it’s totally
up to you. As just mentioned, when the EXPRES-
SION LED is “on” it tells you that the pedal is in
EXPRESSION mode, when this LED is “off” the
pedal is working as a VOLUME controller. As also
just mentioned, to switch the pedal’s function
between EXPRESSION and VOLUME you merely
have to hold down the TAP TEMPO SWITCH (4) for
longer than a second.
Below are some useful things to know about this
pedal:
1. When used as a VOLUME control, this pedal
works after the gain stage of your Valvetronix
amp. This means that it only affects the amp’s
output volume when used, it doesn’t affect the
amount of gain.
2. When used as an EXPRESSION pedal, it can
control the following:
i) The VOX WAH, if that pedal type is selected.
ii) The speed of the U-VIBE, if that pedal type is
selected.
iii) The speed of any MODULATION effect being
used (Chorus, Flanger, Phaser, Tremolo or
Rotary), providing the EX CON (external con-
trol) option is activated.
3. When an external Volume pedal is plugged into
the special jack on the rear panel of the VC-4
(see REAR PANEL section), the BUILT-IN
PEDAL automatically reverts to EXPRESSION
mode.
4. If the WAH or U-VIBE pedals are being used as
well as a MODULATION effect with the EX CON
activated, the BUILT-IN PEDAL will affect both
the pedal and the MOD effect when used in
EXPRESSION mode.
B. T HE R EAR P ANEL .
1. V OLUME J ACK
This is where you can plug in an external Volume
pedal if you’d like to. We recommend you use the
V850 volume pedal but any Volume pedal with a
250K pot will suffice.
NOTE: As mentioned earlier, when you use
an external Volume pedal the VC-4’s BUILT-IN
PEDAL automatically reverts to EXPRES-
SION mode.
2. V OX B US J ACK
This is where you plug in one end of the supplied
cord that connects your VC-4 to the Rear Panel of
your Valvetronix amp.
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