
In its default setting, it is set to auto-length (like a normal loop pedal) and records on JS+Y and clears the recording on JS-Y. Once you've recorded a basic layer, you can layer new ones by hitting the record trigger over again. It can hold a total of 5.4 seconds.
I was thinking one could go a bit further with this. Consider setting a Hold Delay on both MFX1 and MFX2 and use VJS +X/Y to record and VJS-X/Y to clear. Then set up a combi with a couple of instruments. Now, you can record and loop multiple layers and add / clear them in realtime.. (Probably have to set the loop to fixed then to avoid drift between them, but still). By setting the DRY/WET mix to an RT Knob, one could also "mute" these layers too.
Anyway, I thought I'd share, as I haven't read much about this effect in this forum, and it opens up for some pretty cool live playing.