Vox VC-4 manual Rear Panel

4.TAP TEMPO FOOTSWITCH & 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.

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. THE REAR PANEL.

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5.EXPRESSION 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.BUILT-IN PEDAL

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.

1.VOLUME JACK

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.VOX BUS JACK

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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