Making a ‘non-looping’ pad sample loop using ping-pong playback.
This works brilliantly for ping-pong play with pad sounds … a base play mode of FWD.L combined with a square wave LFO, and a mod depth of around 1.8 results in play mode switching back and forth between FWD and REV.
You still need the technique outlined by @ThomasJ to get round this issue (uses 2nd LFO)
And you need firmware 1.15A .