Voodoo Lab GCX Audio Switcher User Manual

GCX

Guitar audio Switcher

OWNER’S MANUAL

Please visit our web site at:

www.voodoolab.com

Copyright 1998 by Digital Music Corporation.

This publication is protected by copyright and all rights are reserved. No part of it may be
reproduced or transmitted by any means or in any form without the express prior consent in
writing from Digital Music Corporation.

Ground Control, System Mix, GCX, and Ground Link are trademarks of Digital Music Corp.

Table of Contents

________________________________________________________

Introduction . . . . . . . . . . . . . . . . . . . 3

Overview
Front Panel
Rear Panel
Unpacking

Buffered and Passive Feed Thru's . . . . . . . . 5

Why Use the Buffer?
Connection Options

Audio Loops . . . . . . . . . . . . . . . . . . . 7

Effects Loops
A/B Switching
Muting Sends
Combining Multiple Amps

Using Loops as Switches . . . . . . . . . . . . 10

Latching Type
Normally Open vs. Normally Closed
Momentary Type

Using the GCX with a Ground Control . . . . . . 12

Connection
Setup Mode
Controlling GCX Loops

Using the GCX without a Ground Control . . . . . 14

Warranty . . . . . . . . . . . . . . . . . . . . 15

DIGITAL MUSIC CORPORATION

Introduction

________________________________________________________

Overview

The GCX Guitar Audio Switcher greatly expands the capabilities of your
Ground Control foot controller. With the GCX, you can select pedal effects,
signal processors, multiple amps or preamps, amp channels and more.

The GCX has two 1/4 inch feed thru's from front to back. The feed thru
labeled "
minimize noise, and allow signal splitting to drive multiple devices. The one
labeled "
amp out.

The GCX has eight audio loops, each with separate IN, OUT, SEND and
RETURN jacks. They can switch effects in and out, A/B select or mute sends
for parallel effects systems, all at either instrument or line level. In addition,
loops can be used as latched or momentary switches.

Your GCX will phantom power both the Ground Control and Ground Link
foot controllers using a standard 5-pin MIDI cable.

Front Panel

• Power switch - turns power on to both the GCX and the Ground Control.

GUITAR IN" is buffered to maximize guitar pickup tone quality,

FEED THRU" is passive and can also be used from back to front as an

• GUITAR IN - buffered feed thru to the GUITAR OUT on the rear panel.

Also normals to the

• FEED THRU - passive feed thru connects to FEED THRU on the rear panel.

• ACTIVE LED - indicates proper connection to the Ground Control. Also

FEED THRU on the rear panel for splitting.

flashes to show MIDI data activity.

• LOOP/SWITCH STATUS LEDs - show current state of each loop.

DIGITAL MUSIC CORPORATION 3

Rear Panel

• POWER - connect to the supplied external AC adapter.

• PEDAL IN* - receives MIDI data from the Ground Control and sends

power to the Ground Control.

• MIDI OUT - echoes MIDI data from the PEDAL IN.

• GUITAR OUT - buffered output from front panel GUITAR IN.

• FEED THRU - passive connection to the front panel FEED THRU. Also

duplicates the GUITAR OUT for splitting when the front panel FEED
THRU is not being used.

• IN/SEND/RETURN/OUT - audio connections for each of the eight loops.

* Warning: The Pedal In jack is not

a standard MIDI In. To avoid damage, please

refer to the section "Using GCX without a Ground Control" before connecting the
Pedal In jack to anything other than a Ground Control.

Unpacking

Your factory carton should contain:

1. This manual

2. The GCX

3. Power adapter

4. Warranty card

Please fill out the enclosed warranty card and return it to Digital Music Corp.
By registering, you enable us to send you important information about related
products, updates and accessories.

DIGITAL MUSIC CORPORATION 4