A footswitch is doing the wrong thing
You are in a different layout
Working as designedThe FM9 has nine layouts and each reassigns all nine switches. Holding a switch usually steps between them.
Fractal Audio Footswitch Functions GuideReference
Reference
Troubleshooting
Indexed by what you notice, not by what the subsystem is called — because when something is wrong you know there's no sound, not that it's a routing problem.
4 of the 7 problems below are not faults. They are documented behaviour that looks like one, and they are marked working as designed.
My guitar sounds thin
There's hum going into my amp
A ground loop
Use a Humbuster cable from the quarter-inch output. On the XLR side, use the ground lift switch.
FM9 Owner's ManualThere's a gap when I change sounds
Presets where scenes would do
Working as designedScenes load nothing and switch seamlessly. Build song sections as scenes.
FM9 Owner's ManualIt won't let me add a block
The preset is out of CPU
Replace duplicate blocks with channels — four channels in one block cost far less than four blocks.
FM9 Owner's ManualMy new FC controller's switches do nothing useful
The factory layouts assume nine switches
Working as designedThey were designed around the FM9's own switches. Adding an FC means writing custom layouts, and Layout Link is what keeps the two boards coherent.
FM9 Owner's ManualI lost my changes
The preset was never stored
Working as designedPress STORE. The edited indicator lights as soon as you change anything, and changing preset discards it without a prompt.
FM9 Owner's Manual