7
Using Ground Control Pro
When connected via MIDI to the Voodoo Lab Ground Control Pro, PX-8+ will function
exactly like the Voodoo Lab GCX Guitar Audio Switcher. You will create presets and
control the loops from the Ground Control Pro. You can also directly toggle loops using
buttons 1-8 on PX-8+.
Setup for Ground Control Pro
Select Loop Strip method as shown in SETUP: Select Preset or Loop Strip Method.
Both PC and CC must be disabled in SETUP: MIDI > Enable Message Types (page 8).
This is the factory default setting.
SETUP
Select Preset or Loop Strip Method
There are two different operation methods for PX-8+. Preset Method allows you to
directly control loops, as well as create and recall 36 preset combinations of loops.
Using Loop Strip Method, buttons 1-8 simply toggle loops 1-8 on/off.
To select operation method:
1) Apply power while holding down button #5. The LEDs will flash until you release the
button.
2) Use button #5 to select operation method. If LED #5 is GREEN, Preset Method is
selected. If the LED is RED, Loop Strip Method is selected.
3) Remove power when finished.
Quiet Switching
PX8 includes a number of unique features to make switching as quiet as possible. Even
so, the relays can still produce a small click in your audio path, especially when using
very high gain. To eliminate this click, PX8 will optionally disable the main output for a
few milliseconds while the loops are switching.
The Quiet Switching (QS) interval is extremely short so that you won’t hear any dropout.
You can select a slightly longer interval in case you still have some audible artifact. Or
you can choose not to use QS at all.
The default is to have QS enabled, with the short interval. To change this:
1) Apply power while holding down button #4. The LEDs will flash until you release the
button.
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