High-Pass Filter (HPF)
Filter that lets high frequencies pass.
Detailed explanation
The high-pass filter (HPF) lets high frequencies pass and cuts the low ones. As the cutoff rises, the sub bass disappears first, then the kick drum, then the bassline. What is left sounds “airy” and “thin”. In the DJ world it sits on a dedicated filter knob on large club mixers. The DDJ-FLX2 does not have one — there it runs through the [CFX] control and whichever Sound Color FX is selected in the software. Ideal for filter-sweep transitions and for fading out atmospherically.
Sources (1)
- DDJ-FLX2 — Bedienungsanleitung (User manuals & documentation)Primary sourceAlphaTheta Corporation·Manufacturer·2024-11-14·retrieved 03.08.2026
German edition, 156 pages. The dates contradict each other: 14.11.2024 on the documentation page, 29.10.2024 in the German support article. To be resolved at the next re-check.
In practice
You still want to hear the old track, but the bass should belong to the new one. Instead of turning the bass knob you push the filter up: everything low falls away, the hi-hats and the pad stay. The transition does not sound cut off, it sounds as if the track is stepping back. This is useful above all where the mixer has only one filter knob per channel and a full three-band EQ manoeuvre would be overkill.
Assessment by the DJLearn editorial team — experience, not a sourced factual claim.
Related terms
Where to learn this
Using filters
The guide that covers this topic in depth.
Explained in this phase
Phase 10: FX & Filter