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Multiplexer block

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Available on which products

  • Axe-Fx III, FM3, FM9: 2 blocks
  • Axe-Fx II, FX8, AX8: no

Channels or X/Y

  • Axe-Fx III and FM9: 6 channels
  • FM3: 4 channels

About the Multiplexer block (MUX)

The Multiplexer block (aka MUX) is a routing and switching tool. It switches between multiple input sources. The input sources are rows on the grid (as long as you have them connected), physical inputs (Input blocks on the grid aren't required), or USB signal. Switching can be on-the-fly, through scenes or through channels.

Set each channel to the desired inout source (Axe-Fx and FM9: 6 channels, FM3: 4 channels).

A modifier can be attached to the Input Select switch, which lets you use a switch or pedal to select the input. This way you can have instruments connected to multiple inputs and switch between them. Only one input can be active at a time. For multiple inputs, use the Mixer block.

No gap is heard when switching sources, because the MUX crossfades between sources very quickly. This provides an excellent way to switch between the output of two Amp blocks.

The Multiplexer block doesn't support Global blocks.


[1] If you want cross-fades between amps you would use two amps and the new Multiplexer block which cross-fades between input sources. You can set the input source to be any row or physical input.

The MUX can't be bypassed.

Also see:

MUX block.png