Tell me about X-PAD FX loop playback.

Sampled sound source can be played in loops by setting the [LOOP] mode as described at “SAMPLER Editing” and “About the sampler slot details Windows” in the “Editing Effects” section of the remixbox operating instructions.
Also, when one of the RMX-1000’s X-PAD FX buttons is pressed while in the [LOOP] mode, the sampled sound source is played, and loop playback continues until the button is pressed again.
Variable speed playback is set, with the BPM set with rekordbox matched to the RMX-1000’s BPM.