DJM-900 - Effect CF A/B assign, what do you use this for?

[Mojaxx]

Ah right. Always used CF option so just presumed fx were post fader on the x fader regardless

Me too... I was very confused when I first used an 800 back in the day and it didn't work like that!

[alientek]

Post-fade echo.

If you use the crossfader, then having the FX assigned to a channel means that cutting off the sound with the crossfader also cuts off the echo tail.

Assigning it to Crossfader A or B means you can cut with the channel fader OR the crossfader and still hear the tail.

He is absolutely correct. For those still not understanding, turn the echo effect on with a long decay, a 1/4 or 1/2 beat timing and assign the fx to the crossfader & scratch a vocal drop or kick drum. Great for spicing up breakdowns, intros etc.