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12 SETUP MENU
THE I/O MENU
Reminder: You do not need to store settings in the
SETUP
menu. EXIT twice when finished.
I/O: INPUT PAGE
The Input page of the I/O menu contains four parameters that scale the input to the A/D converters:
Input 1/Instrument Level, Input 2 Level, Input 3 Level, Input 4 Level .
Remember that, except at very low settings (5% or less), input level adjustments do not affect gain levels or what
you hear. This is because as you adjust the level to the input of the A/D converter, the output of the converter
compensates accordingly, so your guitar signal level remains exactly the same when it reaches the grid and any
virtual amps or effects.
I/O: AUDIO PAGE
PARAMETER
Description
Input 1 Source
ANALOG
USB [CHANNELS 5/6]
SPDIF/AES
This selects which signal source should be routed through the Input 1 block
on the grid. “ANALOG” selects the front or rear Input 1 Instrument input jack.
When “USB (CHANNELS 5/6)” is selected, the Axe-Fx III will process signals
sent from Axe-Fx III Outputs 5 and 6 of a connected computer—perfect for
re-amping without custom presets. When “SPDIF/AES” is selected, signal from
the currently selected digital input will be used (see SPDIF/AES Select, below).
Word Clock
INTERNAL
SPDIF/AES IN
This selects the clock source for the A/D and D/A converters as follows:
INTERNAL: uses the internal clock.
SPDIF/AES IN: uses the clock recovered from the current digital input. A valid
48 kHz data stream must be present at the AES or SPDIF port for the Axe-Fx III
to operate properly.
SPDIF/AES Select
SPDIF, AES
This switch selects whether the SPDIF or AES digital inputs and outputs are
active. Only one format may be active at any time.
USB Buffer Size
8–256
Set this to lower values for less latency with USB Audio, set to higher values
if you are experiencing distorted audio. Stop USB audio streaming when
changing this value so as to allow the buffer to reset properly. Streaming can
be stopped by closing the application sending data to the Axe-Fx III or by
disconnecting the USB cable.
Input 2 Mode
Input 3 Mode
Input 4 Mode
LEFT ONLY
L+R SUM
STEREO
For each of the three stereo input pairs, this setting determines globally how
the Axe-Fx III handles signals received at the corresponding input jacks,
determining whether they should be processed in stereo or mono—and, if
mono, whether “LEFT”, “RIGHT”, or “SUM L+R” should be used. The outputs
of the connected device and the nature of the source material will determine
which setting is best.
It is critical that you choose the Input Mode setting which corresponds to
your actual physical connections. Setting an input to Stereo and then not
connecting one of the two jacks will result in reduced levels!
