16 FX ON/HOLDTriggers the selected Effect. Move the paddle triggers up (for toggle) or down for momentary. No Effect is applied when at middle position. 17 FX SELECTSelect an Effect for both Left/Right Decks. Pre-defined Effects are High-Pass Filter, Low-Pass Filter, Flanger, Echo,Reverb and Phaser. Led will blink when the Effect is enabled on any of the Left/Right decks. Only one Effect can be selected each time. 18 FX DRY/WETAdjust the 1st Parameter - usually the Strength - of the selected Effect on both Left/Right Decks.19 FX BEATSAdjust the 2nd Parameter - usually the Beats - of the selected Effect on both Left/Right Decks.20 TAPWhen track is paused, set current position as 1st beat of the Beat-grid, or tap beat when track is playing to manually adjust Track's BPM.Re-analyze track for BPM and Key